Nothing
R/util.R
In echarty: Minimal R/Shiny Interface to JavaScript Library 'ECharts'
Defines functions
ec.fromJson
ec.inspect
ec.paxis
ec.clmn
ec.data
ec.util
Documented in
ec.clmn
ec.data
ec.fromJson
ec.inspect
ec.paxis
ec.util
# ----------- Primary utilities ----------------------
#' Utility functions
#'
#' tabset, table layout, support for GIS shapefiles through library 'sf'
#'
#' @param cmd utility command, see Details\cr
#' @param js optional JavaScript function, default is NULL.\cr
#' @param ... Optional parameters for the command \cr
#' for \emph{sf.series} - see \href{https://echarts.apache.org/en/option.html#series-scatter.type}{points}, \href{https://echarts.apache.org/en/option.html#series-lines.type}{polylines}, polygons(itemStyle).\cr
#' for \emph{tabset} parameters should be in format \emph{name1=chart1, name2=chart2}, see example\cr
#' @details
#' **cmd = 'sf.series'**\cr
#' \verb{ }Build _leaflet_ or \href{https://echarts.apache.org/en/option.html#geo.map}{geo} map series from shapefiles.\cr
#' \verb{ }Supported types: POINT, MULTIPOINT, LINESTRING, MULTILINESTRING, POLYGON, MULTIPOLYGON \cr
#' \verb{ }Coordinate system is _leaflet_(default), _geo_ or _cartesian3D_ (for POINT(xyz))\cr
#' \verb{ }Limitations:\cr
#' \verb{ }polygons can have only their name in tooltip, \cr
#' \verb{ }assumes Geodetic CRS is WGS 84, for conversion use \link[sf]{st_transform} with _crs=4326_.\cr
#' \verb{ }Parameters:\cr
#' \verb{ }df - value from \link[sf]{st_read}\cr
#' \verb{ }cs - optional _coordinateSystem_ value\cr
#' \verb{ }nid - optional column name for name-id used in tooltips\cr
#' \verb{ }verbose - optional, print shapefile item names in console\cr
#' \verb{ }Returns a list of chart series\cr
#' **cmd = 'sf.bbox'**\cr
#' \verb{ }Returns JavaScript code to position a map inside a bounding box from \link[sf]{st_bbox}, for leaflet only.\cr
#' **cmd = 'sf.unzip'**\cr
#' \verb{ }unzips a remote file and returns local file name of the unzipped .shp file\cr
#' \verb{ }url - URL of remote zipped shapefile\cr
#' \verb{ }shp - optional name of .shp file inside ZIP file if multiple exist. Do not add file extension. \cr
#' **cmd = 'geojson'** \cr
#' \verb{ }custom series list with geoJson objects\cr
#' \verb{ }geojson - object from \link[jsonlite]{fromJSON}\cr
#' \verb{ }... - optional custom series attributes like _itemStyle_\cr
#' \verb{ }ppfill - optional fill color like '#F00', OR NULL for no-fill, for all Points and Polygons\cr
#' \verb{ }nid - optional feature property for item name used in tooltips\cr
#' \verb{ }optional geoJSON _feature properties_: color, ppfill, lwidth, ldash, radius(for points)\cr
#' **cmd = 'layout'** \cr
#' \verb{ }multiple charts in table-like rows/columns format\cr
#' \verb{ }... - List of charts\cr
#' \verb{ }title - optional title for the set, rows= Number of rows, cols= Number of columns\cr
#' \verb{ }Returns a container \link[htmltools]{div} in rmarkdown, otherwise \link[htmltools]{browsable}.\cr
#' \verb{ }For 3-4 charts one would use multiple series within a \href{https://echarts.apache.org/en/option.html#grid}{grid}. \cr
#' \verb{ }For greater number of charts _ec.util(cmd='layout')_ comes in handy\cr
#' **cmd = 'tabset'** \cr
#' \verb{ }... - a list name/chart pairs like \emph{n1=chart1, n2=chart2}, each tab may contain a chart.\cr
#' \verb{ }width - optional width of tabs in pixels\cr
#' \verb{ }height - optional height of tabs in pixels\cr
#' \verb{ }tabStyle - tab style string, see default \emph{tabStyle} variable in the code\cr
#' \verb{ }Returns A) \link[htmltools]{tagList} of tabs when in a pipe without '...' params, see example\cr
#' \verb{ }Returns B) \link[htmltools]{browsable} when '...' params are provided by user\cr
#' **cmd = 'button'** \cr
#' \verb{ }UI button to execute a JS function,\cr
#' \verb{ }text - the button label\cr
#' \verb{ }js - the JS function string\cr
#' \verb{ }... - optional parameters for the \href{https://echarts.apache.org/en/option.html#graphic.elements-rect.type}{rect} element\cr
#' \verb{ }Returns a graphic.elements-\href{https://echarts.apache.org/en/option.html#graphic.elements-rect.type}{rect} element.\cr
#' **cmd = 'morph'** \cr
#' \verb{ }... - a list of charts or chart options\cr
#' \verb{ }js - optional JS function for switching charts. Default function is on \emph{mouseover}. Disable with FALSE.\cr
#' \verb{ }Returns a chart with ability to morph into other charts\cr
#' **cmd = 'fullscreen'** \cr
#' \verb{ }a toolbox feature to toggle fullscreen on/off. Works in a browser, not in RStudio.\cr
#' **cmd = 'rescale'** \cr
#' \verb{ }v - input vector of numeric values to rescale\cr
#' \verb{ }t - target range c(min,max), numeric vector of two\cr
#' **cmd = 'level'** \cr
#' \verb{ }calculate vertical levels for timeline \emph{line} charts, returns a numeric vector\cr
#' \verb{ }df - data.frame with _from_ and _to_ columns\cr
#' \verb{ }from - name of 'from' column\cr
#' \verb{ }to - name of 'to' column\cr
#'
#' @examples
#' if (interactive()) { # comm.out: Fedora errors about some 'browser'
#' library(sf)
#' fname <- system.file("shape/nc.shp", package="sf")
#' nc <- as.data.frame(st_read(fname))
#' ec.init(load= c('leaflet', 'custom'), # load custom for polygons
#' js= ec.util(cmd= 'sf.bbox', bbox= st_bbox(nc$geometry)),
#' series= ec.util(df= nc, nid= 'NAME', itemStyle= list(opacity= 0.3)),
#' tooltip= list(formatter= '{a}')
#' )
#'
#' htmltools::browsable(
#' lapply(iris |> dplyr::group_by(Species) |> dplyr::group_split(),
#' function(x) {
#' x |> ec.init(ctype= 'scatter', title= list(text= unique(x$Species)))
#' }) |>
#' ec.util(cmd= 'tabset')
#' )
#'
#' p1 <- cars |> ec.init(grid= list(top= 20)) # move chart up
#' p2 <- mtcars |> ec.init()
#' ec.util(cmd= 'tabset', cars= p1, mtcars= p2, width= 333, height= 333)
#'
#' lapply(list('dark','macarons','gray','jazz','dark-mushroom'),
#' \(x) cars |> ec.init() |> ec.theme(x) ) |>
#' ec.util(cmd='layout', cols= 2, title= 'my layout')
#'
#' setd <- \(type) {
#' mtcars |> group_by(cyl) |>
#' ec.init(ctype= type,
#' title= list(subtext= 'mouseover points to morph'),
#' xAxis= list(scale= TRUE))
#' }
#' oscatter <- setd('scatter')
#' obar <- setd('bar')
#' ec.util(cmd='morph', oscatter, obar)
#' }
#' @importFrom utils unzip
#' @export
ec.util <- function( ..., cmd='sf.series', js=NULL) {
opts <- list(...)
do.opties <- \(names, dflts=NULL) {
# set default optional parameters
j <- 0
for(n in names) {
j <- j + 1
val <- NULL
if (!is.null(dflts)) val <- dflts[[j]]
tmp <- unname(unlist(opts[n]))
if (!is.null(tmp)) {
val <- tmp
opts[n] <<- NULL
}
assign(n, val, envir= parent.frame())
}
}
switch( cmd,
'sf.series'= {
do.series <- \(dff) {
polig <- \(geom) {
for(k in 1:length(geom)) {
if (inherits(geom[[k]],'matrix')) {
gm <- as.data.frame(geom[[k]])
coords <- list()
for(j in 1:nrow(gm))
coords <- append(coords, list(c(gm[j,1], gm[j,2])))
sers <<- append(sers, list( c(
list(
type= 'custom', coordinateSystem= cs,
renderItem= htmlwidgets::JS('riPolygon'),
name= dname,
data= coords),
opts) #...
))
} else polig(geom[[k]]) # recursive
}
}
geometry <- L1 <- cmd <- NULL # trick to avoid code checking NOTES
sers <- list()
switch( class(dff$geometry)[1],
'sfc_MULTIPOINT' =,
'sfc_POINT'= {
dff <- dff |> rename(value= geometry)
tt <- NULL
flds <- colnames(dff)[! colnames(dff) %in% c("value")]
if (length(flds)>0) {
if (length(flds)>10) flds <- flds[1:10]
tt <- c(paste(rep('%@', length(flds)), collapse='<br>'), flds)
}
pnts <- ec.data(dff, 'names')
sers <- list( c(
list(type= 'scatter', coordinateSystem= cs, data= pnts), opts))
if (!is.null(tt))
sers[[1]]$tooltip= list(formatter= do.call("ec.clmn", as.list(tt)))
},
'sfc_POLYGON' =,
'sfc_MULTIPOLYGON' = {
for(i in 1:nrow(dff)) {
dname <- i
if (!is.null(opts$nid) && opts$nid %in% colnames(dff))
dname <- dff[i, opts$nid][[1]]
if (verbose) cat(dname,',', sep='')
geom <- dff$geometry[[i]]
polig(geom)
}
},
'sfc_LINESTRING' = {
tmp <- dff$geometry
tmp <- as.data.frame(cbind(do.call(rbind, tmp),
L1= rep(seq_along(tmp), times= vapply(tmp, nrow, 0L))))
for(i in 1:nrow(dff)) {
dname <- ifelse(is.null(opts$nid), i, dff[i, opts$nid][[1]])
if (verbose) cat(dname,',', sep='')
coords <- list()
geom <- tmp |> filter(L1==i)
for(k in 1:nrow(geom))
coords <- append(coords, list(c(geom[k,1], geom[k,2])))
sers <- append(sers, list( c(
list( type='lines', polyline= TRUE, coordinateSystem= cs,
name= dname, tooltip= list(formatter= '{a}'),
data= list(coords)),
opts) ))
}
},
'sfc_MULTILINESTRING' = {
for(i in 1:nrow(dff)) {
dname <- ifelse(is.null(opts$nid), i, dff[i,opts$nid][[1]])
if (verbose) cat(dname,',', sep='')
corda <- list()
geom <- dff$geometry[[i]]
for(k in 1:length(geom)) {
gm <- as.data.frame(geom[[k]])
coords <- list()
for(j in 1:nrow(gm))
coords <- append(coords, list(c(gm[j,1], gm[j,2])))
corda <- append(corda, list(coords))
}
sers <- append(sers, list( c(
list( type='lines', polyline= TRUE, coordinateSystem= cs,
name= dname, tooltip= list(formatter= '{a}'),
data= corda),
opts) ))
}
},
stop(paste('ec.util:',class(dff$geometry)[1],'geometry not supported'), call.= FALSE)
)
cnt <- length(sers)
recs <- sum(unlist(lapply(sers, \(x) {
len <- length(x$data)
if (len==1) len <- length(x$data[[1]]) #multiline
len
})))
cat('\n series:',cnt,'coords:',recs,'\n')
sers
}
stopifnot('ec.util: expecting parameter df'= !is.null(opts$df))
stopifnot('ec.util: expecting df$geometry'= !is.null(opts$df$geometry))
cs <- verbose <- NULL # CRAN check fix
do.opties(c('cs','verbose'), list('leaflet', FALSE))
tmp <- opts$df
opts$df <- opts$cs <- NULL
out <- do.series(tmp)
},
'sf.bbox'= {
stopifnot('ec.util: expecting parameter bbox'= !is.null(opts$bbox))
stopifnot('ec.util: expecting bbox in sf format'= !is.null(opts$bbox$ymin))
tmp <- opts$bbox
rng <- paste0('[[',tmp$ymin,',',tmp$xmin,'],[',tmp$ymax,',',tmp$xmax,']]')
out <- c('','',
paste("var map= chart.getModel().getComponent('leaflet').__map;",
"map.fitBounds(",rng,");"))
},
'sf.unzip'= {
stopifnot('ec.util: expecting url of zipped shapefile'= !is.null(opts$url))
destfile <- tempfile('shapefile')
download.file(opts$url, destfile, mode='wb') #, method='curl')
# get name only, use as folder name to unzip to
fldr <- sub(pattern = "(.*)\\..*$", replacement = "\\1", basename(opts$url))
unzip(destfile, exdir=fldr) # new folder under getwd()
# find name
pat <- ifelse (is.null(opts$shp), '*.shp', paste0(opts$shp,'.shp'))
tmp <- list.files(path= fldr, pattern= pat)
if (length(tmp)==0)
stop(paste('ec.util:',pat,'file not found in folder',fldr), call. = FALSE)
out <- paste0(getwd(),'/',fldr,'/',tmp[1])
},
'geojson'= {
geojson <- opts$geojson
opts$geojson <- NULL
cat('\ngeoJSON has',nrow(geojson$features),'features')
myGeojson <- toString(jsonlite::toJSON(geojson))
dfill <- ''
if ('ppfill' %in% names(opts)) {
dfill <- ifelse(is.null(opts$ppfill), 'null', paste0('"',opts$ppfill,'"'))
dfill <- paste0('ecf.geofill=',dfill,';')
}
out <- c( list(type= 'custom',
coordinateSystem= 'leaflet',
# set JS variables for riGeoJson() to work with
renderItem= htmlwidgets::JS(paste("(params, api) => {",dfill,
" ecf.geojson=",myGeojson,"; return riGeoJson(params, api); }")),
data= if (is.null(opts$nid))
lapply(1:nrow(geojson$features), list)
else
lapply(unlist(tmp$features$properties[opts$nid],
use.names=FALSE), \(n) { list(name=n)})
), opts)
},
'tabset'= {
width <- height <- tabStyle <- NULL # CRAN check fix
do.opties(c('width','height','tabStyle'),
list('100%', 400, "<style>
/* CSS for the main interaction */
.tabset > input[type='radio'] {
position: absolute;
left: -200vw;
}
.tabset .tab-panel { display: none; }
.tabset > input:first-child:checked ~ .tab-panels > .tab-panel:first-child,
.tabset > input:nth-child(3):checked ~ .tab-panels > .tab-panel:nth-child(2),
.tabset > input:nth-child(5):checked ~ .tab-panels > .tab-panel:nth-child(3),
.tabset > input:nth-child(7):checked ~ .tab-panels > .tab-panel:nth-child(4),
.tabset > input:nth-child(9):checked ~ .tab-panels > .tab-panel:nth-child(5),
.tabset > input:nth-child(11):checked ~ .tab-panels > .tab-panel:nth-child(6) {
display: block;
}
/* Styling */
body {
font: 16px/1.5em 'Overpass', 'Open Sans', Helvetica, sans-serif;
color: #333; font-weight: 300;
}
.tabset > label {
position: relative;
display: inline-block;
padding: 15px 15px 25px;
border: 1px solid transparent;
border-bottom: 0;
cursor: pointer;
font-weight: 600;
}
.tabset > label::after {
content: '';
position: absolute;
left: 15px;
bottom: 10px;
width: 22px;
height: 4px;
background: #8d8d8d;
}
.tabset > label:hover,
.tabset > input:focus + label { color: #06c; }
.tabset > label:hover::after,
.tabset > input:focus + label::after,
.tabset > input:checked + label::after { background: #06c;}
.tabset > input:checked + label {
border-color: #ccc;
border-bottom: 1px solid #fff;
margin-bottom: -1px;
}
.tab-panel {
padding: 10px 0;
border-top: 1px solid #ccc;
}
body { padding: 10px; }
.tabset { max-width: 65em; }
</style>")
)
tnames <- names(opts)
isPipe <- FALSE
if ((is.null(tnames) || length(tnames)==1) &&
inherits(opts[[1]][[1]],'echarty')) { # pipe
opts <- opts[[1]]
cnt <- 1
tnames <- names(opts) <- lapply(opts, \(oo) {
tit <- oo$x$opts$title$text
if (is.null(tit) || grepl(' ',tit)) {
tit <- paste('chart', cnt); cnt <<- cnt + 1 }
tit
})
#tnames <- names(opts) <- paste0('chart', 1:length(opts))
isPipe <- TRUE
}
tpans <- htmltools::tags$div(class='tab-panels')
tset <- htmltools::tags$div(class='tabset', id='ec_tabset')
cnt <- 1
for(n in tnames) {
tid <- paste0('tab', cnt)
tinp <- htmltools::tags$input(type='radio', id=tid,
name='tabso', `aria-controls`=n, onclick=paste0('trsz(',cnt-1,')') )
if (cnt==1) tinp <- htmltools::tagAppendAttributes(tinp, checked=1)
tset <- htmltools::tagAppendChildren(tset,
tinp, htmltools::tags$label(`for`=tid, n))
cont <- unname(opts[n])
cont[[1]]$width <- width
cont[[1]]$height <- height
tpans <- htmltools::tagAppendChild(tpans,
htmltools::tags$section(id=n, class='tab-panel', cont))
tout <- htmltools::tagAppendChild(tset, tpans)
cnt <- cnt + 1
}
out <- htmltools::tagList(htmltools::HTML(tabStyle), tout)
# resize on tab click
tmp <- "function trsz(i) { var ecs= document.getElementsByClassName('echarty');
ecs[i].htmlwidget_data_init_result.resize(); }"
out <- htmltools::tagAppendChild(out,
htmltools::tags$script(tmp))
if (!isPipe)
out <- htmltools::browsable(out)
},
'layout'= {
title <- NULL # CRAN check fix
do.opties(c('rows','cols','title'))
lplots <- length(opts[[1]])
if (is.null(rows) & !is.null(cols)) rows <- ceiling(lplots/cols)
if (!is.null(rows) & is.null(cols)) cols <- ceiling(lplots/rows)
if (is.null(rows) & is.null(cols)) { rows <- lplots; cols <- 1 }
x <- 0
tg <- htmltools::tagList()
for (i in 1:rows) {
r <- htmltools::div(style='display:flex;')
for (j in 1:cols) {
x <- x + 1
sty <- paste0('width:', round(100/cols),'vw')
c <- htmltools::div(style= sty)
if (x <= lplots)
c <- htmltools::div(style= sty, opts[[1]][[x]])
r <- htmltools::tagAppendChild(r, c)
}
tg <- htmltools::tagAppendChildren(tg, htmltools::br(), r)
}
out <- htmltools::browsable(
htmltools::div(
style= "width:100%",
htmltools::div(style= 'justify-content:center!important; text-align:center!important',
htmltools::h3(title) ),
tg )
)
},
'morph'= {
# TODO: individual oo$x$theme support
opts <- lapply(opts, \(oo) {
if (inherits(oo, 'echarty')) {
oo$x$opts$series <- .merlis(oo$x$opts$series,
list(universalTransition= list(enabled= TRUE)) )
oo$x$opts
}
else oo
})
# series types should be different for morph options
defaultHandler <- htmlwidgets::JS("
function(event) {
opt= this.getOption();
keep= opt.morph;
for(i=0; i<keep.length; i++) {
if (opt.series[0].type==keep[i].series[0].type) {
next= (i+1) % keep.length;
optcurr= Object.assign({}, keep[next]);
break;
}
};
if (!optcurr) return;
optcurr.morph= keep;
this.setOption(optcurr, true);
}")
out <- ec.init(preset=FALSE, js=js)
out$x$opts <- opts[[1]]
out$x$opts$morph <- opts
if (is.null(js))
out$x$on <- list(list(
event= 'mouseover', handler= defaultHandler
))
out
},
'rescale'= {
scale <- opts$t
if (!is.numeric(scale)) scale <- c(0,10)
stopifnot("ec.util: rescale 't' vector too long/short"= length(scale)==2)
stopifnot("ec.util: rescale 't' vector elements equal"= scale[1]!=scale[2])
smin <- min(scale); smax <- max(scale)-smin;
vect <- opts$v
stopifnot("ec.util: rescale 'v' paramater missing"= !is.null(vect))
stopifnot("ec.util: rescale 'v' is not a numeric vector"= is.numeric(vect))
# out <- drop(scale(vect, center=min(vect)-min(vect)*0.05, scale=diff(range(vect)))) * smax
out <- drop(scale(vect, center=min(vect), scale=diff(range(vect)))) * smax
out <- sapply(out, as.vector)
out <- out + smin
},
'fullscreen'= {
out <- list(myecfs= list(show=TRUE, title= 'fullscreen',
icon= 'path://M5 5h5V3H3v7h2zm5 14H5v-5H3v7h7zm11-5h-2v5h-5v2h7zm-2-4h2V3h-7v2h5z',
onclick= htmlwidgets::JS('function(){
tmp = this.ecModel.getOption();
ecf.fscreen(tmp.echwid);
}')
))
},
'level'= {
from <- to <- NULL
do.opties(c('from','to'), list('from','to'))
if (is.null(opts$df) || !is.data.frame(opts$df))
stop("ec.util-level: 'df' paramater missing or invalid", call. = FALSE)
if (!all(c(from,to) %in% colnames(opts$df)))
stop(paste('ec.util-level: df has no "',from,' ',to,'" columns'), call. = FALSE)
# build levels
df <- opts$df
level <- rep(1, nrow(df)) # bottom start
rr <- rep(0, nrow(df))
for(i in 1:nrow(df)){
ifrom <- unlist(df[,from])[i]
ito <- unlist(df[,to])[i]
for(j in 1:min(which(rr==0))) {
if (ifrom > rr[j]) {
rr[j] <- ito
level[i] <- j
break
}
}
}
out <- level
},
'button' = {
text <- NULL # CRAN check fix
do.opties(c('text'), list('back'))
# calc H & W of rect, for default font
tmp <- sum(charToRaw(text) == charToRaw('\n'))
h <- 20 * if (tmp==0) 1 else tmp
w <- if (h>20) max(sapply(unlist(strsplit(text, '\n')),nchar)) else nchar(text)
w <- w * 10
tmp <- list(
type= 'rect', right= 40, top= 20, zlevel=4,
shape= list(height=h, width=w, r=5),
style= list(fill= 'lightgray'),
textContent= list(zlevel= 4, style= list(text= text, fill= 'black')),
textConfig= list(position= 'inside'),
onclick= htmlwidgets::JS(js)
)
tt <- list(...) # user values overwrite defaults
out <- .merlis(tmp, tt)
},
stop(paste("ec.util: invalid 'cmd' parameter",cmd), call. = FALSE)
)
out
}
#' Data helper
#'
#' Make data lists from a data.frame
#'
#' @param df Required chart data as **data.frame**. \cr
#' Except when format is _dendrogram_, then df is a **list**, result of \link[stats]{hclust} function.\cr
#' @param format Output list format\cr \itemize{
#' \item **dataset** = list to be used in \href{https://echarts.apache.org/en/option.html#dataset.source}{dataset} (default), or in \href{https://echarts.apache.org/en/option.html#series-scatter.data}{series.data} (without header). \cr
#' \item **values** = list for customized \href{https://echarts.apache.org/en/option.html#series-scatter.data}{series.data} \cr
#' \item **names** = named lists useful for named data like \href{https://echarts.apache.org/en/option.html#series-sankey.links}{sankey links}.
#' \item **dendrogram** = build series data for Hierarchical Clustering dendrogram
#' \item **treePC** = build series data for tree charts from parent/children data.frame
#' \item **treeTT** = build series data for tree charts from data.frame like Titanic.\cr
#' \item **boxplot** = build dataset and source lists, see Details
#' }
#' @param header for dataset, to include the column names or not, default TRUE. Set it to FALSE for \href{https://echarts.apache.org/en/option.html#series-scatter.data}{series.data}.\cr
#' @param ... optional parameters\cr
#' Optional parameters for **boxplot** are:\cr
#' * _layout_ = 'h' for horizontal(default) or 'v' for vertical layout\cr
#' * _outliers_ boolean to add outlier points (default FALSE)\cr
#' * _jitter_ value for \link[base]{jitter} of numerical values in second column, default 0 (no scatter). Adds scatter series on top of boxplot.\cr
#'
#' @return A list for _dataset.source_, _series.data_ or other lists:\cr
#' For boxplot - a named list, see Details and Examples \cr
#' For dendrogram & treePC - a tree structure, see format in \href{https://echarts.apache.org/en/option.html#series-tree.data}{tree data}
#'
#' @details
#' `format='boxplot'` requires the first two _df_ columns as: \cr
#' \verb{ }column for the non-computational categorical axis\cr
#' \verb{ }column with (numeric) data to compute the five boxplot values\cr
#' Additional grouping is supported on a column after the second. Groups will show in the legend, if enabled.\cr
#' Returns a `list(dataset, series, xAxis, yAxis)` to set params in [ec.init].
#' Make sure there is enough data for computation, 4+ values per boxplot.\cr
#' `format='treeTT'` expects data.frame _df_ columns _pathString,value,(optional itemStyle)_ for \link[data.tree]{FromDataFrameTable}.\cr
#' It will add column 'pct' with value percentage for each node. See Details.
#' @seealso some live \href{https://rpubs.com/echarty/data-models}{code samples}
#'
#' @examples
#' library(dplyr)
#' ds <- iris |> relocate(Species) |>
#' ec.data(format= 'boxplot', jitter= 0.1, layout= 'v')
#' ec.init(
#' dataset= ds$dataset, series= ds$series, xAxis= ds$xAxis, yAxis= ds$yAxis,
#' legend= list(show= TRUE), tooltip= list(show= TRUE)
#' )
#'
#' hc <- hclust(dist(USArrests), "complete")
#' ec.init(preset= FALSE,
#' series= list(list(
#' type= 'tree', orient= 'TB', roam= TRUE, initialTreeDepth= -1,
#' data= ec.data(hc, format='dendrogram'),
#' # layout= 'radial', symbolSize= ec.clmn(scale= 0.33),
#' ## exclude added labels like 'pXX', leaving only the originals
#' label= list(formatter= htmlwidgets::JS(
#' "function(n) { out= /p\\d+/.test(n.name) ? '' : n.name; return out;}"))
#' ))
#' )
#'
#' # build required pathString,value and optional itemStyle columns
#' df <- as.data.frame(Titanic) |> rename(value= Freq) |> mutate(
#' pathString= paste('Titanic\nSurvival', Survived, Age, Sex, Class, sep='/'),
#' itemStyle= case_when(Survived=='Yes' ~"color='green'", TRUE ~"color='LightSalmon'")) |>
#' select(pathString, value, itemStyle)
#' ec.init(
#' series= list(list(
#' data= ec.data(df, format='treeTT'),
#' type= 'tree', symbolSize= ec.clmn("(x) => {return Math.log(x)*10}")
#' )),
#' tooltip= list(formatter= ec.clmn('%@<br>%@%','value','pct'))
#' )
#'
#' @importFrom utils tail
#' @importFrom grDevices boxplot.stats
#' @importFrom data.tree Aggregate
#' @export
ec.data <- function(df, format='dataset', header=FALSE, ...) {
stopifnot('ec.data: expecting parameter df'= !missing(df))
if (format=='dendrogram') {
stopifnot('ec.data: df should be hclust for dendrogram'= inherits(df, 'hclust'))
hc <- df
# decode hc$merge with hc$labels
inew <- list()
i <- 0
tmp <- apply(hc$merge, 1, \(x) {
fst <- if (x[1]<0) { if (is.null(hc$labels)) -x[1] else hc$labels[-x[1]] } else inew[[x[1]]]$p[1]
snd <- if (x[2]<0) { if (is.null(hc$labels)) -x[2] else hc$labels[-x[2]] } else inew[[x[2]]]$p[1]
i <<- i+1
inew <<- append(inew, list(
list(p= rep(paste0('p',i),2), c= c(fst, snd),
h= rep(round(hc$height[i], 2), 2))))
})
tmp <- unlist(inew)
parents <- children <- vals <- c()
for(i in 1:length(tmp)) {
fst <- substr(names(tmp[i]), 1, 1)
switch(fst,
'p'= parents <- c(parents, tmp[i]),
'c'= children <- c(children, tmp[i]),
'h'= vals <- c(vals, as.numeric(tmp[i]))
)
}
# add top element, required for tree chart
vals <- c(unname(vals), 1)
children <- c(unname(children), unname(tail(parents,1)))
parents <- c(unname(parents), '')
# convert from data.frame to JSON
dafr <- data.frame(parents=parents, children=children, value=vals)
tmp <- data.tree::FromDataFrameNetwork(dafr)
json <- data.tree::ToListExplicit(tmp, unname=TRUE)
return(json$children)
}
stopifnot('ec.data: df has to be data.frame'= inherits(df, 'data.frame'))
# save var for ec.clmn
.setColnm(colnames(df))
if (format=='treePC') {
# for sunburst,tree,treemap
if (# !all(colnames(df) == c('parents', 'children', 'value')) ||
!all(unlist(unname(lapply(as.list(df[,1:3]), class))) ==
c('character','character','numeric')) )
stop('ec.data: df columns need to be in order (parents, children, value), only value is numeric', call. = FALSE)
tryCatch({
tmp <- data.tree::FromDataFrameNetwork(df)
},
error= function(e) { stop(e) })
json <- data.tree::ToListExplicit(tmp, unname=TRUE)
return(json$children)
}
if (format %in% c('treeTT','treeTK')) {
# data for tree,sunburst,treemap from Titanic-like data
chNames <- function(lest) {
stopifnot('chNames: expecting a list'= inherits(lest, 'list'))
# recursive, build pct and itemStyle
cldrn <- lest$children
nm <- names(cldrn)
tot <- unlist(sapply(cldrn, '[[', 'value'))
if (!is.null(tot)) {
tot <- sum(sapply(cldrn, '[[', 'value'))
lest$value <- tot
}
#cat('\nnames:',nm,' ',tot)
cldrn <- unname(cldrn)
cnt <- 0
lest$children <- lapply(cldrn, \(x) {
cnt <<- cnt+1; x$name <- nm[cnt]
if (!is.null(tot)) x$pct <- round(x$value / tot * 100, 2)
if (!is.null(x$itemStyle))
x$itemStyle <- eval(parse(text=paste0('list(',x$itemStyle,')')))
if (!is.null(x$children)) x <- chNames(x)
x })
if (!is.null(lest$children[[1]]$itemStyle))
lest$itemStyle <- lest$children[[1]]$itemStyle
lest
}
# verify columns pathString, value, itemStyle
stopifnot('ec.data: df first columns not pathString,value'= c('pathString','value') %in% colnames(df))
stopifnot('ec.data: column value not numeric'= is.numeric(df$value))
tryCatch({
nod <- data.tree::FromDataFrameTable(df, ...)
},
error= function(e) { stop(e) })
nod$Do(function(x) x$value <- data.tree::Aggregate(x, "value", sum))
json <- data.tree::ToListExplicit(nod)
tmp <- chNames(json)
return(list(tmp))
}
rownames(df) <- NULL
n <- seq_along(df[[1]]) # assuming all lists in df have the same length
tmp <- lapply(n, \(i) lapply(df, "[[", i)) # preserve column types
if (format=='dataset') {
datset <- lapply(tmp, unname)
if (header)
datset <- c(list(colnames(df)), datset)
}
else if (format=='values' || isTRUE(format)) {
datset <- lapply(tmp, \(x) list(value=unlist(unname(x))))
}
else if (format=='boxplot') {
args <- list(...)
rady <- if ('ol.radius' %in% names(args)) args$ol.radius else NULL
jitter <- if ('jitter' %in% names(args)) args$jitter else 0
layout <- if ('layout' %in% names(args)) args$layout else 'h'
outliers <- if ('outliers' %in% names(args)) args$outliers else FALSE
cn <- colnames(df)
stopifnot('boxplot: df should have 2+ columns'= length(cn)>1)
colas <- cn[1]
colb5 <- cn[2]
stopifnot('boxplot: 2nd column must be numeric'= is.numeric(df[[colb5]]))
# is there another group beside colas ?
grpcol <- if (is.grouped_df(df) && group_vars(df)[1]!=colas)
group_vars(df)[1] else NULL
yaxis <- list(list(type= 'category', name=colas)) # default horiz layout
xaxis <- list(list(scale= TRUE, name=colb5))
ttcol <- 1
# category axis labels
if (is.factor(df[[colas]]))
axe <- paste(levels(df[[colas]]), collapse="','")
else
axe <- paste(sort(as.character(unique(df[[colas]]))), collapse="','")
# tbox <- "(p) => { d=p.data; out= '<b>'+p.seriesName+'</b>'+
# '<br>min '+d[1].toFixed(3)+ '<br>Q1 '+d[2].toFixed(3)+
# '<br>median '+d[3].toFixed(3)+ '<br>Q3 '+d[4].toFixed(3)+
# '<br>max '+d[5].toFixed(3); return out; }"
ttip <- c('Low', 'Q1', 'Q2', 'Q3', 'High')
if (!is.null(grpcol)) { # grouped
tmp <- df |> group_split()
dataset <- lapply(tmp, \(dd) {
dv <- dd |> arrange(.data[[colas]]) |>
group_by(.data[[colas]]) |> group_split()
src <- lapply(dv, \(vv) {
if (nrow(vv)<5) stop(paste0('ec.data: insufficient data in group "'
,grpcol,'"'), call.= FALSE)
vv[[colb5]]
})
list(source= if (length(src[[1]])==1) list(src) else src)
})
series <- list()
for (i in 1:length(tmp)) {
dataset <- append(dataset,
list(list( fromDatasetIndex= i-1, transform= list(type= 'boxplot'))))
series <- append(series, list(list(
name= tmp[[i]][[grpcol]][1],
#tooltip= list(formatter= tbox),
encode= list(tooltip= ttip),
type= 'boxplot', datasetIndex= i+length(tmp)-1) ))
}
axe <- paste0("function(v) { return ['",axe,"'][v]; }")
if (outliers) {
gcnt <- length(tmp) # group count
c2 <- gcnt+gcnt-1
# new datasets with outliers
dsotl <- lapply(gcnt:c2, \(x) list( fromDatasetIndex=x, fromTransformResult=1))
serol <- lapply((gcnt*2):(gcnt+c2), \(x)
list(type='custom',
datasetIndex=x, renderItem= htmlwidgets::JS('riOutliers'),
encode= list(x=2, y=1),
name=series[[x-c2]]$name, z=4,
itemStyle= list(borderDashOffset= rady)
))
if (layout=='v') {
serol <- lapply(serol, \(ss) {
e <- ss$encode; ss$encode <- list(x=e$y, y=e$x); ss })
}
dataset <- append(dataset, dsotl)
series <- append(series, serol) }
}
else { # non-grouped
bdf <- ungroup(df) |> arrange(.data[[colas]]) |>
group_by(across({colas})) |> group_split()
src <- lapply(bdf, \(x) {x[[colb5]]})
nms <- paste(unlist(lapply(bdf, \(x) {unique(x[[colas]])})), collapse="','")
nms <- paste0("(p) => ['",nms,"'][p.value]")
dataset <- list(
list(source= src),
list(transform= list(type= 'boxplot',
config= list(itemNameFormatter= htmlwidgets::JS(nms)
)))
)
series <- list(list(type='boxplot', name= 'boxplot',
datasetIndex= 1,
encode= list(y= 1, x= c(2,3,4,5,6), tooltip=ttip)
))
# default is horizontal, for vertical swap xAxis/yAxis category type
if (layout=='v') {
e <- series[[1]]$encode
series[[1]]$encode <- list(x=e$y, y=e$x, tooltip=ttip) # swap x & y
}
axe <- "function(v) { return v;}"
if (outliers) {
# new dataset with outliers and serie for it
dsotl <- list(list( fromDatasetIndex=1, fromTransformResult=1 ))
serol <- list(list(type='scatter',
datasetIndex=2, name=series[[1]]$name, z=4,
itemStyle= list(borderDashOffset= rady) ))
if (jitter==0) {
serol[[1]] <- .merlis(serol[[1]], args)
series[[1]] <- .merlis(series[[1]], args)
}
if (layout=='h')
serol[[1]]$encode <- list(x=2, y=1) # swap x & y
dataset <- append(dataset, dsotl)
series <- append(series, serol)
}
}
if (is.factor(df[[colas]]) || is.character(df[[colas]]))
yaxis[[1]] <- c(yaxis[[1]], list(axisLabel= list(formatter= htmlwidgets::JS(axe))))
if (layout=='v') {
swap <- xaxis; xaxis <- yaxis; yaxis <- swap; ttcol <- 2
}
if (jitter>0) {
tmp <- df |> arrange(.data[[colas]]) |>
group_by(.data[[colas]]) |> group_split()
mcyl <- lapply(tmp, \(x) unname(unlist(x[[colb5]])))
names(mcyl) <- sort(unique(df[[colas]]))
i <- 0.5
serj <- lapply(names(mcyl), \(nn) {
yy <- unname(unlist(mcyl[nn]))
xx <- jitter(rep(i, length(yy)), amount= jitter)
out <- list(type= 'scatter', ...)
if (!'name' %in% names(args)) out$name <- nn
if (!'large' %in% names(args)) out$large <- TRUE
#if (!'tooltip' %in% names(args)) out$tooltip <- list(formatter= ec.clmn(ttcol))
if (!'z' %in% names(args)) out$z <- 3
if (layout=='v') {
out$data <- do.call(Map, c(f = c, list(xx, yy)))
out$xAxisIndex <- 2
if (i==0.5) xaxis <<- append(xaxis,
list(list(max= length(mcyl), show=F)))
} else {
out$data <- do.call(Map, c(f = c, list(yy, xx)))
out$yAxisIndex <- 2
if (i==0.5) yaxis <<- append(yaxis,
list(list(max= length(mcyl), show=F)))
}
i <<- i + 1
out
})
series <- append(series, serj)
}
return(list(dataset= dataset, series= series, xAxis=xaxis, yAxis=yaxis))
}
else { # format=='names'
datset <- tmp
} # format=='names'
return(datset)
}
#' Data column format
#'
#' Helper function to display/format data column(s) by index or name
#'
#' @param col A single column index(number) or column name(quoted string), \cr
#' or a \link[base]{sprintf} string template for multiple indexes.\cr
#' NULL(default) for charts with single values like tree, pie.\cr
#' 'json' to display tooltip with all available values to choose from.\cr
#' 'log' to write all values in the JS console (F12) for debugging.\cr
#' Can contain JS function starting with _'function('_ (or format _'(x) => {}'_).\cr
#' @param ... Comma separated column indexes or names, only when \emph{col} is \emph{sprintf}. This allows formatting of multiple columns, as for a tooltip.\cr
#' @param scale A positive number, multiplier for numeric columns. When scale is 0, all numeric values are rounded.
#' @return A JavaScript code string (usually a function) marked as executable, see \link[htmlwidgets]{JS}.
#'
#' @details This function is useful for attributes like formatter, color, symbolSize, label.\cr
#' Column indexes are counted in R and start with 1.\cr
#' Omit _col_ or use index -1 for single values in tree/pie charts, \emph{axisLabel.formatter} or \emph{valueFormatter}. See [ec.data] dendrogram example.\cr
#' Column indexes are decimals for combo charts with multiple series, see [ecr.band] example. The whole number part is the serie index, the decimal part is the column index inside.\cr
#' \emph{col} as sprintf has the same placeholder \emph{%@} for both column indexes or column names.\cr
#' \emph{col} as sprintf can contain double quotes, but not single or backquotes.\cr
#' Template placeholders with formatting:\cr
#' * \emph{%@} will display column value as-is.\cr
#' * \emph{%L@} will display a number in locale format, like '12,345.09'.\cr
#' * \emph{%LR@} rounded number in locale format, like '12,345'.\cr
#' * \emph{%R@} rounded number, like '12345'.\cr
#' * \emph{%M@} marker in serie's color.\cr
#'
#' @examples
#' tmp <- data.frame(Species = as.vector(unique(iris$Species)),
#' emoji = c('A','B','C'))
#' df <- iris |> dplyr::inner_join(tmp) # add 6th column emoji
#' df |> dplyr::group_by(Species) |> ec.init(
#' series.param= list(label= list(show= TRUE, formatter= ec.clmn('emoji'))),
#' tooltip= list(formatter=
#' # with sprintf template + multiple column indexes
#' ec.clmn('%M@ species <b>%@</b><br>s.len <b>%@</b><br>s.wid <b>%@</b>', 5,1,2))
#' )
#'
#' @export
ec.clmn <- function(col=NULL, ..., scale=1) {
if (is.null(scale)) scale=1
if (scale==1) scl <- 'return c;'
else {
if (scale==0) scl <- 'return Math.round(c);'
else scl <- paste0('return (parseFloat(c)*',scale,');')
}
args <- list(...)
ret <- paste("pos=[]; c= String(typeof x=='object' ? x.value : x);", scl)
if (is.null(col)) {} # for pie,sunburst
else if (col=='log')
ret <- "console.log(x); return 'logged';"
else if (col=='json')
ret <- 'return JSON.stringify(x, null, " ").replace(/{/g,"<br>{").replace(/"value":/g,"<br> value:").replace(/"data":/g,"<br> data:").replace(/"seriesIndex":/g,"<br> seriesIndex:");'
else if (is.character(col) && (grepl(') =>', col) ||
startsWith(col, 'function(')))
return(htmlwidgets::JS(col))
else if (is.na(suppressWarnings(as.numeric(col)))) {
spf <- "var sprintf= (template, vals) => {
j=0; if (template=='%@') return vals[j++];
return template.replace(/%@|%L@|%LR@|%R@|%R2@|%M@/g, (m) => {
if (m=='%@') return vals[j++];
if (m=='%L@') return Number(vals[j++]).toLocaleString();
if (m=='%LR@') return Math.round(Number(vals[j++])).toLocaleString();
if (m=='%R@') return Math.round(Number(vals[j++]));
if (m=='%R2@') return Number(vals[j++]).toFixed(2);
if (m=='%M@') return x.marker;
}); };"
if (length(args)==0) { # col is solitary name
args <- col; col <- '%@' # replace
}
# col is sprintf
tmp <- suppressWarnings(as.numeric(args) -1)
if (all(is.na(tmp))) {
# multiple column names (non-numeric strings)
# to find position in colnames
tmp <- .getColnm()
stopifnot("ec.clmn: colnames missing.
Use ec.clmn after ec.data and/or inside ec.init(df).
Otherwise use column indexes instead of names."= !is.null(tmp))
spf <- paste0(spf, " pos=['", paste(tmp, collapse="','"), "'];")
t0 <- sapply(args, \(s) toString(paste0("x.data['", s,"']")) )
t0 <- paste(t0, collapse=',')
t1 <- paste(args, collapse='`,`')
# ec.data(df,'values'): x is array for size, x.data.value for tooltip
# x.data =
# 1) object when ec.data('names')
# 2) array only when ec.data('dataset') or df
# 3) x.data.value array with x.dimensionNames when ec.data('values')
# if series.dimensions=colnames(df) not set then x.dimensionNames may be wrong,
# like ['lng', 'lat', 'value', 'value0',...] console.log(x.dimensionNames);
# was if (x.dimensionNames && x.dimensionNames.length>0) pos= args.map(z => x.dimensionNames.indexOf(z)); else..
ret <- paste0( spf, "
aa= Array.isArray(x) ? x : x.data; tmp= null;
if (aa && aa instanceof Object && !Array.isArray(aa)) {
tmp= Object.keys(aa); if (tmp.length==1 && tmp[0]=='value') aa= x.data.value;}
if (tmp && tmp.length>1)
vv=[",t0,"];
else {
if (!aa || !aa.length) return `no data`;
args= [`",t1,"`];
pos= args.map(z => pos.indexOf(z));
vv= pos.map(p => aa[p]); }")
} # col.names
else {
# multiple numeric, they could be in x, x.data, x.value OR x[].value[]
# in combo-charts (ec.band), get decimal portion as .value[] index
tmp <- paste(tmp, collapse=',')
ret <- paste0( spf, "ss=[",tmp,"];
vv= ss.map((e) => {
if (e<0) return x.value ? x.value : x;
i= Math.floor(e);
return x.value!=null ? x.value[i] :
x.data!=null ? x.data[i] :
x[i]!=null ? x[i] : `no data` });
if (vv.length > 0)
vv = ss.map((e,idx) => {
if (typeof vv[idx] != 'object') return vv[idx];
f= Math.round(e % 1 *10) -1;
return vv[idx].value[f];
}); ") # multi-series 1.2, 3.1
} # col.indexes
if (scale >0) ret <- paste(ret,"vv= vv.map(e => isNaN(e) | !e ? e : e*",scale,");")
if (scale==0) ret <- paste(ret,"vv= vv.map(e => isNaN(e) | !e ? e : Math.round(e));")
# keep backwards-quotes for handling '\n'
ret <- paste0(ret, "c= sprintf(`",col,"`, vv); return c; ")
} # col is string
else { # col is solitary numeric
if (length(args) > 0)
warning('col is numeric, others are ignored', call.=FALSE)
col <- as.numeric(col) - 1 # from R to JS counting
if (col >= 0)
ret <- paste0('c= String(x.value!=null ? x.value[',col,
'] : x.data!=null ? x.data[',col,'] : x[',col,'] ); ',scl)
} # col is solitary numeric
ret <- gsub('\t',' ', gsub('\n',' ', ret, fixed=T), fixed=T)
htmlwidgets::JS(paste0('function(x) {', ret, '}'))
}
# ----------- Other utilities ----------------------
#' Parallel Axis
#'
#' Build 'parallelAxis' for a parallel chart
#'
#' @param dfwt An echarty widget OR a data.frame(regular or grouped)
#' @param cols A string vector with columns names in desired order
#' @param minmax Boolean to add max/min limits or not, default TRUE
#' @param ... Additional attributes for \href{https://echarts.apache.org/en/option.html#parallelAxis}{parallelAxis}.
#' @return A list, see format in \href{https://echarts.apache.org/en/option.html#parallelAxis}{parallelAxis}.
#' @details This function could be chained to _ec.init_ or used with a _data.frame_\cr
#' @examples
#' iris |> dplyr::group_by(Species) |> # chained
#' ec.init(ctype= 'parallel', series.param= list(lineStyle= list(width=3))) |>
#' ec.paxis(cols= c('Petal.Length','Petal.Width','Sepal.Width'))
#'
#' mtcars |> ec.init(ctype= 'parallel',
#' parallelAxis= ec.paxis(mtcars, cols= c('gear','cyl','hp','carb'), nameRotate= 45),
#' series.param= list(smooth= TRUE)
#' )
#'
#' @export
ec.paxis <- function(dfwt=NULL, cols=NULL, minmax=TRUE, ...) {
pax <- list(); grnm <- ''
if (inherits(dfwt, 'data.frame')) {
coln <- colnames(dfwt)
cfilter <- 1:length(coln)
if (is.grouped_df(dfwt)) {
# dont include grouping column (grnm)
grnm <- group_vars(dfwt)[[1]]
cfilter <- cfilter[!cfilter==match(grnm, colnames(dfwt))]
}
idf <- dfwt
}
else {
stopifnot('ec.paxis: dfwt has to be class echarty'= inherits(dfwt, 'echarty'))
coln <- unlist(dfwt$x$opts$dataset[[1]]$source[1])
cfilter <- 1:length(coln)
if (length(dfwt$x$opts$dataset) > 1) {
grnm <- dfwt$x$opts$dataset[[2]]$transform$config$dimension
cfilter <- cfilter[!cfilter==match(grnm, coln)]
}
idf <- as.data.frame(t(do.call(cbind, dfwt$x$opts$dataset[[1]]$source[(-1)])))
colnames(idf) <- coln
idf <- as.data.frame(apply(idf, 2, unlist, simplify=FALSE))
}
if (!is.null(cols)) {
stopifnot('ec.paxis: some cols not found'= all(cols %in% coln))
cfilter <- match(cols, coln)
}
for(i in cfilter) {
cn <- coln[i]
tmp <- list(dim= i-1, name= cn, ...) # JS count is -1
if (!is.numeric(idf[cn][[1]]))
tmp$type <- 'category'
else {
if (minmax) {
tmp$max <- max(idf[cn])
tmp$min <- min(idf[cn])
}
}
pax <- append(pax, list(tmp));
}
if (inherits(dfwt, 'data.frame'))
pax
else {
dfwt$x$opts$parallelAxis= pax
dfwt
}
}
#' Themes
#'
#' Apply a pre-built or custom coded theme to a chart
#'
#' @param wt An \code{echarty} widget as returned by [ec.init]
#' @param name Name of existing theme file (without extension), or name of custom theme defined in \code{code}.
#' @param code Custom theme as JSON formatted string, default NULL.
#' @return An \code{echarty} widget.
#'
#' @details Just a few built-in themes are included in folder \code{inst/themes}.\cr
#' Their names are dark, gray, jazz, dark-mushroom and macarons.\cr
#' The entire ECharts theme collection could be found \href{https://github.com/apache/echarts/tree/master/theme}{here} and files copied if needed.\cr
#' To create custom themes or view predefined ones, visit \href{https://echarts.apache.org/en/theme-builder.html}{this site}.
#'
#' @examples
#' mtcars |> ec.init() |> ec.theme('dark-mushroom')
#' cars |> ec.init() |> ec.theme('mine', code=
#' '{"color": ["green","#eeaa33"],
#' "backgroundColor": "lemonchiffon"}')
#'
#' @export
ec.theme <- function (wt, name, code= NULL)
{
stopifnot('ec.theme: name required'= !missing(name))
wt$x$theme <- name
if (!is.null(code))
wt$x$themeCode <- code
else {
wt$x$themeCode <- NULL
path <- system.file('themes', package= 'echarty')
dep <- htmltools::htmlDependency(
name= name,
version= '1.0.0', src= c(file= path),
script= paste0(name, '.js'))
wt$dependencies <- append(wt$dependencies, list(dep))
}
wt
}
#' Chart to JSON
#'
#' Convert chart to JSON string
#'
#' @param wt An \code{echarty} widget as returned by [ec.init]
#' @param target type of resulting value: \cr
#' \verb{ }'opts' - the htmlwidget _options_ as JSON (default)\cr
#' \verb{ }'full' - the _entire_ htmlwidget as JSON\cr
#' \verb{ }'data' - info about chart's embedded data (char vector)
#' @param ... Additional attributes to pass to \link[jsonlite]{toJSON}\cr
#' 'file' - optional file name to save to when target='full'\cr
#' @return A JSON string, except when \code{target} is 'data' - then
#' a character vector.
#'
#' @details Must be invoked or chained as last command.\cr
#' target='full' will export all JavaScript custom code, ready to be used on import.
#'
#' @examples
#' # extract JSON
#' json <- cars |> ec.init() |> ec.inspect()
#' json
#'
#' # get from JSON and modify plot
#' ec.fromJson(json) |> ec.theme('macarons')
#'
#' @export
ec.inspect <- function(wt, target='opts', ...) {
stopifnot("ec.inspect: target only 'opts', 'data' or 'full'"= target %in% c('opts','data','full'))
if (target=='full') {
jjwt <- jsonlite::serializeJSON(wt)
opts <- list(...)
if ('file' %in% names(opts)) {
fn <- opts$file
con <- file(fn,'wb'); write(jjwt, con); close(con)
return(paste('saved in',fn))
} else
return(jjwt)
}
opts <- wt$x$opts
if (target=='data') {
out <- list()
if (!is.null(opts$dataset))
out <- sapply(opts$dataset, \(d) {
if (!is.null(d$source[1]))
paste('dataset:',paste(unlist(d$source[1]), collapse=', '),
'rows=',length(d$source))
else if (!is.null(d$transform[1]))
gsub('"', "'", paste(d$transform, collapse=', '))
})
i <- 0
out <- append(out, sapply(opts$series, \(s) {
i <<- i+1
str <- paste0('serie',i,' name:',s$name)
if (!is.null(s$type)) str <- paste0(str, ' type:',s$type)
if (!is.null(s$dimensions)) str <- paste0(str, ' dim:',s$dimensions)
if (!is.null(s$datasetIndex)) str <- paste0(str, ' dsi:',s$datasetIndex)
if (!is.null(s$encode)) str <- paste0(str, ' enc:',paste(s$encode, collapse=', '))
if (!is.null(s$data))
str <- paste(str, gsub('"', "'", paste(s$data[1], collapse=', ')))
str
}))
return(unlist(out))
}
params <- list(...)
if ('pretty' %in% names(params) && !params$pretty)
tmp <- jsonlite::toJSON(opts, force=TRUE, auto_unbox=TRUE,
null='null', ...)
else # pretty by default
tmp <- jsonlite::toJSON(opts, force=TRUE, auto_unbox=TRUE,
null='null', pretty=TRUE, ...)
return(tmp)
}
#' JSON to chart
#'
#' Convert JSON string or file to chart
#'
#' @param txt Could be one of the following:\cr
#' \verb{ }class _url_, like \code{url('https://serv.us/cars.txt')}\cr
#' \verb{ }class _file_, like \code{file('c:/temp/cars.txt','rb')}\cr
#' \verb{ }class _json_, like \code{ec.inspect(p)}, for options or full\cr
#' \verb{ }class _character_, JSON string with options only, see example below\cr
#' @param ... Any attributes to pass to internal [ec.init] when _txt_ is options only
#' @return An _echarty_ widget.
#'
#' @details _txt_ could be either a list of options (x$opts) to be set by \href{https://echarts.apache.org/en/api.html#echartsInstance.setOption}{setOption},\cr
#' OR an entire _htmlwidget_ generated thru [ec.inspect] when _target='full'_.\cr
#' The latter imports all JavaScript functions defined by the user.
#'
#' @examples
#' txt <- '{
#' "xAxis": { "data": ["Mon", "Tue", "Wed"]}, "yAxis": { },
#' "series": { "type": "line", "data": [150, 230, 224] } }'
#' ec.fromJson(txt)
#'
#' # ec.fromJson('https://helgasoft.github.io/echarty/test/pfull.json')
#' @export
ec.fromJson <- function(txt, ...) {
recur <- \(opts) {
names <- names(opts)
for(k in seq_along(opts)) {
nn <- opts[[k]]
if (inherits(nn, 'list'))
opts[[k]] <- recur(opts[[k]]) # recursive
else if (
(!is.null(names) && names[[k]]=='renderItem') ||
(inherits(nn,'character') && length(nn)==1 &&
(grepl(') =>', nn) ||
startsWith(nn, 'function(') ||
startsWith(nn, 'new echarts.')))) {
opts[[k]] <- htmlwidgets::JS(opts[[k]])
}
}
opts
}
if (inherits(txt, c('url','file')))
return(jsonlite::unserializeJSON(txt))
if (inherits(txt, 'character')) {
if (any(startsWith(txt, c('http://','https://'))))
return(jsonlite::unserializeJSON(url(txt)))
} else if (inherits(txt, 'json')) {
if (grepl('preRenderHook',txt))
return(jsonlite::unserializeJSON(txt))
} else
stop(paste0("ec.fromJson: unknown class '",class(txt),"'"))
tmp <- jsonlite::fromJSON(txt, simplifyVector = FALSE)
# options only
obj <- ec.init(...)
obj$x$opts <- recur(tmp)
obj
}
#' ------------- Licence -----------------
#'
#' Original work Copyright 2023 Larry Helgason
#'
#' Licensed under the Apache License, Version 2.0 (the "License");
#' you may not use this file except in compliance with the License.
#' You may obtain a copy of the License at
#'
#' http://www.apache.org/licenses/LICENSE-2.0
#'
#' Unless required by applicable law or agreed to in writing, software
#' distributed under the License is distributed on an "AS IS" BASIS,
#' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#' See the License for the specific language governing permissions and
#' limitations under the License.
#' ---------------------------------------
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echarty documentation built on Oct. 16, 2023, 1:06 a.m.
R Package Documentation
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Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Defines functions ec.fromJson ec.inspect ec.paxis ec.clmn ec.data ec.util
Documented in ec.clmn ec.data ec.fromJson ec.inspect ec.paxis ec.util
# ----------- Primary utilities ----------------------
#' Utility functions
#'
#' tabset, table layout, support for GIS shapefiles through library 'sf'
#'
#' @param cmd utility command, see Details\cr
#' @param js optional JavaScript function, default is NULL.\cr
#' @param ... Optional parameters for the command \cr
#' for \emph{sf.series} - see \href{https://echarts.apache.org/en/option.html#series-scatter.type}{points}, \href{https://echarts.apache.org/en/option.html#series-lines.type}{polylines}, polygons(itemStyle).\cr
#' for \emph{tabset} parameters should be in format \emph{name1=chart1, name2=chart2}, see example\cr
#' @details
#' **cmd = 'sf.series'**\cr
#' \verb{ }Build _leaflet_ or \href{https://echarts.apache.org/en/option.html#geo.map}{geo} map series from shapefiles.\cr
#' \verb{ }Supported types: POINT, MULTIPOINT, LINESTRING, MULTILINESTRING, POLYGON, MULTIPOLYGON \cr
#' \verb{ }Coordinate system is _leaflet_(default), _geo_ or _cartesian3D_ (for POINT(xyz))\cr
#' \verb{ }Limitations:\cr
#' \verb{ }polygons can have only their name in tooltip, \cr
#' \verb{ }assumes Geodetic CRS is WGS 84, for conversion use \link[sf]{st_transform} with _crs=4326_.\cr
#' \verb{ }Parameters:\cr
#' \verb{ }df - value from \link[sf]{st_read}\cr
#' \verb{ }cs - optional _coordinateSystem_ value\cr
#' \verb{ }nid - optional column name for name-id used in tooltips\cr
#' \verb{ }verbose - optional, print shapefile item names in console\cr
#' \verb{ }Returns a list of chart series\cr
#' **cmd = 'sf.bbox'**\cr
#' \verb{ }Returns JavaScript code to position a map inside a bounding box from \link[sf]{st_bbox}, for leaflet only.\cr
#' **cmd = 'sf.unzip'**\cr
#' \verb{ }unzips a remote file and returns local file name of the unzipped .shp file\cr
#' \verb{ }url - URL of remote zipped shapefile\cr
#' \verb{ }shp - optional name of .shp file inside ZIP file if multiple exist. Do not add file extension. \cr
#' **cmd = 'geojson'** \cr
#' \verb{ }custom series list with geoJson objects\cr
#' \verb{ }geojson - object from \link[jsonlite]{fromJSON}\cr
#' \verb{ }... - optional custom series attributes like _itemStyle_\cr
#' \verb{ }ppfill - optional fill color like '#F00', OR NULL for no-fill, for all Points and Polygons\cr
#' \verb{ }nid - optional feature property for item name used in tooltips\cr
#' \verb{ }optional geoJSON _feature properties_: color, ppfill, lwidth, ldash, radius(for points)\cr
#' **cmd = 'layout'** \cr
#' \verb{ }multiple charts in table-like rows/columns format\cr
#' \verb{ }... - List of charts\cr
#' \verb{ }title - optional title for the set, rows= Number of rows, cols= Number of columns\cr
#' \verb{ }Returns a container \link[htmltools]{div} in rmarkdown, otherwise \link[htmltools]{browsable}.\cr
#' \verb{ }For 3-4 charts one would use multiple series within a \href{https://echarts.apache.org/en/option.html#grid}{grid}. \cr
#' \verb{ }For greater number of charts _ec.util(cmd='layout')_ comes in handy\cr
#' **cmd = 'tabset'** \cr
#' \verb{ }... - a list name/chart pairs like \emph{n1=chart1, n2=chart2}, each tab may contain a chart.\cr
#' \verb{ }width - optional width of tabs in pixels\cr
#' \verb{ }height - optional height of tabs in pixels\cr
#' \verb{ }tabStyle - tab style string, see default \emph{tabStyle} variable in the code\cr
#' \verb{ }Returns A) \link[htmltools]{tagList} of tabs when in a pipe without '...' params, see example\cr
#' \verb{ }Returns B) \link[htmltools]{browsable} when '...' params are provided by user\cr
#' **cmd = 'button'** \cr
#' \verb{ }UI button to execute a JS function,\cr
#' \verb{ }text - the button label\cr
#' \verb{ }js - the JS function string\cr
#' \verb{ }... - optional parameters for the \href{https://echarts.apache.org/en/option.html#graphic.elements-rect.type}{rect} element\cr
#' \verb{ }Returns a graphic.elements-\href{https://echarts.apache.org/en/option.html#graphic.elements-rect.type}{rect} element.\cr
#' **cmd = 'morph'** \cr
#' \verb{ }... - a list of charts or chart options\cr
#' \verb{ }js - optional JS function for switching charts. Default function is on \emph{mouseover}. Disable with FALSE.\cr
#' \verb{ }Returns a chart with ability to morph into other charts\cr
#' **cmd = 'fullscreen'** \cr
#' \verb{ }a toolbox feature to toggle fullscreen on/off. Works in a browser, not in RStudio.\cr
#' **cmd = 'rescale'** \cr
#' \verb{ }v - input vector of numeric values to rescale\cr
#' \verb{ }t - target range c(min,max), numeric vector of two\cr
#' **cmd = 'level'** \cr
#' \verb{ }calculate vertical levels for timeline \emph{line} charts, returns a numeric vector\cr
#' \verb{ }df - data.frame with _from_ and _to_ columns\cr
#' \verb{ }from - name of 'from' column\cr
#' \verb{ }to - name of 'to' column\cr
#'
#' @examples
#' if (interactive()) { # comm.out: Fedora errors about some 'browser'
#' library(sf)
#' fname <- system.file("shape/nc.shp", package="sf")
#' nc <- as.data.frame(st_read(fname))
#' ec.init(load= c('leaflet', 'custom'), # load custom for polygons
#' js= ec.util(cmd= 'sf.bbox', bbox= st_bbox(nc$geometry)),
#' series= ec.util(df= nc, nid= 'NAME', itemStyle= list(opacity= 0.3)),
#' tooltip= list(formatter= '{a}')
#' )
#'
#' htmltools::browsable(
#' lapply(iris |> dplyr::group_by(Species) |> dplyr::group_split(),
#' function(x) {
#' x |> ec.init(ctype= 'scatter', title= list(text= unique(x$Species)))
#' }) |>
#' ec.util(cmd= 'tabset')
#' )
#'
#' p1 <- cars |> ec.init(grid= list(top= 20)) # move chart up
#' p2 <- mtcars |> ec.init()
#' ec.util(cmd= 'tabset', cars= p1, mtcars= p2, width= 333, height= 333)
#'
#' lapply(list('dark','macarons','gray','jazz','dark-mushroom'),
#' \(x) cars |> ec.init() |> ec.theme(x) ) |>
#' ec.util(cmd='layout', cols= 2, title= 'my layout')
#'
#' setd <- \(type) {
#' mtcars |> group_by(cyl) |>
#' ec.init(ctype= type,
#' title= list(subtext= 'mouseover points to morph'),
#' xAxis= list(scale= TRUE))
#' }
#' oscatter <- setd('scatter')
#' obar <- setd('bar')
#' ec.util(cmd='morph', oscatter, obar)
#' }
#' @importFrom utils unzip
#' @export
ec.util <- function( ..., cmd='sf.series', js=NULL) {
opts <- list(...)
do.opties <- \(names, dflts=NULL) {
# set default optional parameters
j <- 0
for(n in names) {
j <- j + 1
val <- NULL
if (!is.null(dflts)) val <- dflts[[j]]
tmp <- unname(unlist(opts[n]))
if (!is.null(tmp)) {
val <- tmp
opts[n] <<- NULL
}
assign(n, val, envir= parent.frame())
}
}
switch( cmd,
'sf.series'= {
do.series <- \(dff) {
polig <- \(geom) {
for(k in 1:length(geom)) {
if (inherits(geom[[k]],'matrix')) {
gm <- as.data.frame(geom[[k]])
coords <- list()
for(j in 1:nrow(gm))
coords <- append(coords, list(c(gm[j,1], gm[j,2])))
sers <<- append(sers, list( c(
list(
type= 'custom', coordinateSystem= cs,
renderItem= htmlwidgets::JS('riPolygon'),
name= dname,
data= coords),
opts) #...
))
} else polig(geom[[k]]) # recursive
}
}
geometry <- L1 <- cmd <- NULL # trick to avoid code checking NOTES
sers <- list()
switch( class(dff$geometry)[1],
'sfc_MULTIPOINT' =,
'sfc_POINT'= {
dff <- dff |> rename(value= geometry)
tt <- NULL
flds <- colnames(dff)[! colnames(dff) %in% c("value")]
if (length(flds)>0) {
if (length(flds)>10) flds <- flds[1:10]
tt <- c(paste(rep('%@', length(flds)), collapse='<br>'), flds)
}
pnts <- ec.data(dff, 'names')
sers <- list( c(
list(type= 'scatter', coordinateSystem= cs, data= pnts), opts))
if (!is.null(tt))
sers[[1]]$tooltip= list(formatter= do.call("ec.clmn", as.list(tt)))
},
'sfc_POLYGON' =,
'sfc_MULTIPOLYGON' = {
for(i in 1:nrow(dff)) {
dname <- i
if (!is.null(opts$nid) && opts$nid %in% colnames(dff))
dname <- dff[i, opts$nid][[1]]
if (verbose) cat(dname,',', sep='')
geom <- dff$geometry[[i]]
polig(geom)
}
},
'sfc_LINESTRING' = {
tmp <- dff$geometry
tmp <- as.data.frame(cbind(do.call(rbind, tmp),
L1= rep(seq_along(tmp), times= vapply(tmp, nrow, 0L))))
for(i in 1:nrow(dff)) {
dname <- ifelse(is.null(opts$nid), i, dff[i, opts$nid][[1]])
if (verbose) cat(dname,',', sep='')
coords <- list()
geom <- tmp |> filter(L1==i)
for(k in 1:nrow(geom))
coords <- append(coords, list(c(geom[k,1], geom[k,2])))
sers <- append(sers, list( c(
list( type='lines', polyline= TRUE, coordinateSystem= cs,
name= dname, tooltip= list(formatter= '{a}'),
data= list(coords)),
opts) ))
}
},
'sfc_MULTILINESTRING' = {
for(i in 1:nrow(dff)) {
dname <- ifelse(is.null(opts$nid), i, dff[i,opts$nid][[1]])
if (verbose) cat(dname,',', sep='')
corda <- list()
geom <- dff$geometry[[i]]
for(k in 1:length(geom)) {
gm <- as.data.frame(geom[[k]])
coords <- list()
for(j in 1:nrow(gm))
coords <- append(coords, list(c(gm[j,1], gm[j,2])))
corda <- append(corda, list(coords))
}
sers <- append(sers, list( c(
list( type='lines', polyline= TRUE, coordinateSystem= cs,
name= dname, tooltip= list(formatter= '{a}'),
data= corda),
opts) ))
}
},
stop(paste('ec.util:',class(dff$geometry)[1],'geometry not supported'), call.= FALSE)
)
cnt <- length(sers)
recs <- sum(unlist(lapply(sers, \(x) {
len <- length(x$data)
if (len==1) len <- length(x$data[[1]]) #multiline
len
})))
cat('\n series:',cnt,'coords:',recs,'\n')
sers
}
stopifnot('ec.util: expecting parameter df'= !is.null(opts$df))
stopifnot('ec.util: expecting df$geometry'= !is.null(opts$df$geometry))
cs <- verbose <- NULL # CRAN check fix
do.opties(c('cs','verbose'), list('leaflet', FALSE))
tmp <- opts$df
opts$df <- opts$cs <- NULL
out <- do.series(tmp)
},
'sf.bbox'= {
stopifnot('ec.util: expecting parameter bbox'= !is.null(opts$bbox))
stopifnot('ec.util: expecting bbox in sf format'= !is.null(opts$bbox$ymin))
tmp <- opts$bbox
rng <- paste0('[[',tmp$ymin,',',tmp$xmin,'],[',tmp$ymax,',',tmp$xmax,']]')
out <- c('','',
paste("var map= chart.getModel().getComponent('leaflet').__map;",
"map.fitBounds(",rng,");"))
},
'sf.unzip'= {
stopifnot('ec.util: expecting url of zipped shapefile'= !is.null(opts$url))
destfile <- tempfile('shapefile')
download.file(opts$url, destfile, mode='wb') #, method='curl')
# get name only, use as folder name to unzip to
fldr <- sub(pattern = "(.*)\\..*$", replacement = "\\1", basename(opts$url))
unzip(destfile, exdir=fldr) # new folder under getwd()
# find name
pat <- ifelse (is.null(opts$shp), '*.shp', paste0(opts$shp,'.shp'))
tmp <- list.files(path= fldr, pattern= pat)
if (length(tmp)==0)
stop(paste('ec.util:',pat,'file not found in folder',fldr), call. = FALSE)
out <- paste0(getwd(),'/',fldr,'/',tmp[1])
},
'geojson'= {
geojson <- opts$geojson
opts$geojson <- NULL
cat('\ngeoJSON has',nrow(geojson$features),'features')
myGeojson <- toString(jsonlite::toJSON(geojson))
dfill <- ''
if ('ppfill' %in% names(opts)) {
dfill <- ifelse(is.null(opts$ppfill), 'null', paste0('"',opts$ppfill,'"'))
dfill <- paste0('ecf.geofill=',dfill,';')
}
out <- c( list(type= 'custom',
coordinateSystem= 'leaflet',
# set JS variables for riGeoJson() to work with
renderItem= htmlwidgets::JS(paste("(params, api) => {",dfill,
" ecf.geojson=",myGeojson,"; return riGeoJson(params, api); }")),
data= if (is.null(opts$nid))
lapply(1:nrow(geojson$features), list)
else
lapply(unlist(tmp$features$properties[opts$nid],
use.names=FALSE), \(n) { list(name=n)})
), opts)
},
'tabset'= {
width <- height <- tabStyle <- NULL # CRAN check fix
do.opties(c('width','height','tabStyle'),
list('100%', 400, "<style>
/* CSS for the main interaction */
.tabset > input[type='radio'] {
position: absolute;
left: -200vw;
}
.tabset .tab-panel { display: none; }
.tabset > input:first-child:checked ~ .tab-panels > .tab-panel:first-child,
.tabset > input:nth-child(3):checked ~ .tab-panels > .tab-panel:nth-child(2),
.tabset > input:nth-child(5):checked ~ .tab-panels > .tab-panel:nth-child(3),
.tabset > input:nth-child(7):checked ~ .tab-panels > .tab-panel:nth-child(4),
.tabset > input:nth-child(9):checked ~ .tab-panels > .tab-panel:nth-child(5),
.tabset > input:nth-child(11):checked ~ .tab-panels > .tab-panel:nth-child(6) {
display: block;
}
/* Styling */
body {
font: 16px/1.5em 'Overpass', 'Open Sans', Helvetica, sans-serif;
color: #333; font-weight: 300;
}
.tabset > label {
position: relative;
display: inline-block;
padding: 15px 15px 25px;
border: 1px solid transparent;
border-bottom: 0;
cursor: pointer;
font-weight: 600;
}
.tabset > label::after {
content: '';
position: absolute;
left: 15px;
bottom: 10px;
width: 22px;
height: 4px;
background: #8d8d8d;
}
.tabset > label:hover,
.tabset > input:focus + label { color: #06c; }
.tabset > label:hover::after,
.tabset > input:focus + label::after,
.tabset > input:checked + label::after { background: #06c;}
.tabset > input:checked + label {
border-color: #ccc;
border-bottom: 1px solid #fff;
margin-bottom: -1px;
}
.tab-panel {
padding: 10px 0;
border-top: 1px solid #ccc;
}
body { padding: 10px; }
.tabset { max-width: 65em; }
</style>")
)
tnames <- names(opts)
isPipe <- FALSE
if ((is.null(tnames) || length(tnames)==1) &&
inherits(opts[[1]][[1]],'echarty')) { # pipe
opts <- opts[[1]]
cnt <- 1
tnames <- names(opts) <- lapply(opts, \(oo) {
tit <- oo$x$opts$title$text
if (is.null(tit) || grepl(' ',tit)) {
tit <- paste('chart', cnt); cnt <<- cnt + 1 }
tit
})
#tnames <- names(opts) <- paste0('chart', 1:length(opts))
isPipe <- TRUE
}
tpans <- htmltools::tags$div(class='tab-panels')
tset <- htmltools::tags$div(class='tabset', id='ec_tabset')
cnt <- 1
for(n in tnames) {
tid <- paste0('tab', cnt)
tinp <- htmltools::tags$input(type='radio', id=tid,
name='tabso', `aria-controls`=n, onclick=paste0('trsz(',cnt-1,')') )
if (cnt==1) tinp <- htmltools::tagAppendAttributes(tinp, checked=1)
tset <- htmltools::tagAppendChildren(tset,
tinp, htmltools::tags$label(`for`=tid, n))
cont <- unname(opts[n])
cont[[1]]$width <- width
cont[[1]]$height <- height
tpans <- htmltools::tagAppendChild(tpans,
htmltools::tags$section(id=n, class='tab-panel', cont))
tout <- htmltools::tagAppendChild(tset, tpans)
cnt <- cnt + 1
}
out <- htmltools::tagList(htmltools::HTML(tabStyle), tout)
# resize on tab click
tmp <- "function trsz(i) { var ecs= document.getElementsByClassName('echarty');
ecs[i].htmlwidget_data_init_result.resize(); }"
out <- htmltools::tagAppendChild(out,
htmltools::tags$script(tmp))
if (!isPipe)
out <- htmltools::browsable(out)
},
'layout'= {
title <- NULL # CRAN check fix
do.opties(c('rows','cols','title'))
lplots <- length(opts[[1]])
if (is.null(rows) & !is.null(cols)) rows <- ceiling(lplots/cols)
if (!is.null(rows) & is.null(cols)) cols <- ceiling(lplots/rows)
if (is.null(rows) & is.null(cols)) { rows <- lplots; cols <- 1 }
x <- 0
tg <- htmltools::tagList()
for (i in 1:rows) {
r <- htmltools::div(style='display:flex;')
for (j in 1:cols) {
x <- x + 1
sty <- paste0('width:', round(100/cols),'vw')
c <- htmltools::div(style= sty)
if (x <= lplots)
c <- htmltools::div(style= sty, opts[[1]][[x]])
r <- htmltools::tagAppendChild(r, c)
}
tg <- htmltools::tagAppendChildren(tg, htmltools::br(), r)
}
out <- htmltools::browsable(
htmltools::div(
style= "width:100%",
htmltools::div(style= 'justify-content:center!important; text-align:center!important',
htmltools::h3(title) ),
tg )
)
},
'morph'= {
# TODO: individual oo$x$theme support
opts <- lapply(opts, \(oo) {
if (inherits(oo, 'echarty')) {
oo$x$opts$series <- .merlis(oo$x$opts$series,
list(universalTransition= list(enabled= TRUE)) )
oo$x$opts
}
else oo
})
# series types should be different for morph options
defaultHandler <- htmlwidgets::JS("
function(event) {
opt= this.getOption();
keep= opt.morph;
for(i=0; i<keep.length; i++) {
if (opt.series[0].type==keep[i].series[0].type) {
next= (i+1) % keep.length;
optcurr= Object.assign({}, keep[next]);
break;
}
};
if (!optcurr) return;
optcurr.morph= keep;
this.setOption(optcurr, true);
}")
out <- ec.init(preset=FALSE, js=js)
out$x$opts <- opts[[1]]
out$x$opts$morph <- opts
if (is.null(js))
out$x$on <- list(list(
event= 'mouseover', handler= defaultHandler
))
out
},
'rescale'= {
scale <- opts$t
if (!is.numeric(scale)) scale <- c(0,10)
stopifnot("ec.util: rescale 't' vector too long/short"= length(scale)==2)
stopifnot("ec.util: rescale 't' vector elements equal"= scale[1]!=scale[2])
smin <- min(scale); smax <- max(scale)-smin;
vect <- opts$v
stopifnot("ec.util: rescale 'v' paramater missing"= !is.null(vect))
stopifnot("ec.util: rescale 'v' is not a numeric vector"= is.numeric(vect))
# out <- drop(scale(vect, center=min(vect)-min(vect)*0.05, scale=diff(range(vect)))) * smax
out <- drop(scale(vect, center=min(vect), scale=diff(range(vect)))) * smax
out <- sapply(out, as.vector)
out <- out + smin
},
'fullscreen'= {
out <- list(myecfs= list(show=TRUE, title= 'fullscreen',
icon= 'path://M5 5h5V3H3v7h2zm5 14H5v-5H3v7h7zm11-5h-2v5h-5v2h7zm-2-4h2V3h-7v2h5z',
onclick= htmlwidgets::JS('function(){
tmp = this.ecModel.getOption();
ecf.fscreen(tmp.echwid);
}')
))
},
'level'= {
from <- to <- NULL
do.opties(c('from','to'), list('from','to'))
if (is.null(opts$df) || !is.data.frame(opts$df))
stop("ec.util-level: 'df' paramater missing or invalid", call. = FALSE)
if (!all(c(from,to) %in% colnames(opts$df)))
stop(paste('ec.util-level: df has no "',from,' ',to,'" columns'), call. = FALSE)
# build levels
df <- opts$df
level <- rep(1, nrow(df)) # bottom start
rr <- rep(0, nrow(df))
for(i in 1:nrow(df)){
ifrom <- unlist(df[,from])[i]
ito <- unlist(df[,to])[i]
for(j in 1:min(which(rr==0))) {
if (ifrom > rr[j]) {
rr[j] <- ito
level[i] <- j
break
}
}
}
out <- level
},
'button' = {
text <- NULL # CRAN check fix
do.opties(c('text'), list('back'))
# calc H & W of rect, for default font
tmp <- sum(charToRaw(text) == charToRaw('\n'))
h <- 20 * if (tmp==0) 1 else tmp
w <- if (h>20) max(sapply(unlist(strsplit(text, '\n')),nchar)) else nchar(text)
w <- w * 10
tmp <- list(
type= 'rect', right= 40, top= 20, zlevel=4,
shape= list(height=h, width=w, r=5),
style= list(fill= 'lightgray'),
textContent= list(zlevel= 4, style= list(text= text, fill= 'black')),
textConfig= list(position= 'inside'),
onclick= htmlwidgets::JS(js)
)
tt <- list(...) # user values overwrite defaults
out <- .merlis(tmp, tt)
},
stop(paste("ec.util: invalid 'cmd' parameter",cmd), call. = FALSE)
)
out
}
#' Data helper
#'
#' Make data lists from a data.frame
#'
#' @param df Required chart data as **data.frame**. \cr
#' Except when format is _dendrogram_, then df is a **list**, result of \link[stats]{hclust} function.\cr
#' @param format Output list format\cr \itemize{
#' \item **dataset** = list to be used in \href{https://echarts.apache.org/en/option.html#dataset.source}{dataset} (default), or in \href{https://echarts.apache.org/en/option.html#series-scatter.data}{series.data} (without header). \cr
#' \item **values** = list for customized \href{https://echarts.apache.org/en/option.html#series-scatter.data}{series.data} \cr
#' \item **names** = named lists useful for named data like \href{https://echarts.apache.org/en/option.html#series-sankey.links}{sankey links}.
#' \item **dendrogram** = build series data for Hierarchical Clustering dendrogram
#' \item **treePC** = build series data for tree charts from parent/children data.frame
#' \item **treeTT** = build series data for tree charts from data.frame like Titanic.\cr
#' \item **boxplot** = build dataset and source lists, see Details
#' }
#' @param header for dataset, to include the column names or not, default TRUE. Set it to FALSE for \href{https://echarts.apache.org/en/option.html#series-scatter.data}{series.data}.\cr
#' @param ... optional parameters\cr
#' Optional parameters for **boxplot** are:\cr
#' * _layout_ = 'h' for horizontal(default) or 'v' for vertical layout\cr
#' * _outliers_ boolean to add outlier points (default FALSE)\cr
#' * _jitter_ value for \link[base]{jitter} of numerical values in second column, default 0 (no scatter). Adds scatter series on top of boxplot.\cr
#'
#' @return A list for _dataset.source_, _series.data_ or other lists:\cr
#' For boxplot - a named list, see Details and Examples \cr
#' For dendrogram & treePC - a tree structure, see format in \href{https://echarts.apache.org/en/option.html#series-tree.data}{tree data}
#'
#' @details
#' `format='boxplot'` requires the first two _df_ columns as: \cr
#' \verb{ }column for the non-computational categorical axis\cr
#' \verb{ }column with (numeric) data to compute the five boxplot values\cr
#' Additional grouping is supported on a column after the second. Groups will show in the legend, if enabled.\cr
#' Returns a `list(dataset, series, xAxis, yAxis)` to set params in [ec.init].
#' Make sure there is enough data for computation, 4+ values per boxplot.\cr
#' `format='treeTT'` expects data.frame _df_ columns _pathString,value,(optional itemStyle)_ for \link[data.tree]{FromDataFrameTable}.\cr
#' It will add column 'pct' with value percentage for each node. See Details.
#' @seealso some live \href{https://rpubs.com/echarty/data-models}{code samples}
#'
#' @examples
#' library(dplyr)
#' ds <- iris |> relocate(Species) |>
#' ec.data(format= 'boxplot', jitter= 0.1, layout= 'v')
#' ec.init(
#' dataset= ds$dataset, series= ds$series, xAxis= ds$xAxis, yAxis= ds$yAxis,
#' legend= list(show= TRUE), tooltip= list(show= TRUE)
#' )
#'
#' hc <- hclust(dist(USArrests), "complete")
#' ec.init(preset= FALSE,
#' series= list(list(
#' type= 'tree', orient= 'TB', roam= TRUE, initialTreeDepth= -1,
#' data= ec.data(hc, format='dendrogram'),
#' # layout= 'radial', symbolSize= ec.clmn(scale= 0.33),
#' ## exclude added labels like 'pXX', leaving only the originals
#' label= list(formatter= htmlwidgets::JS(
#' "function(n) { out= /p\\d+/.test(n.name) ? '' : n.name; return out;}"))
#' ))
#' )
#'
#' # build required pathString,value and optional itemStyle columns
#' df <- as.data.frame(Titanic) |> rename(value= Freq) |> mutate(
#' pathString= paste('Titanic\nSurvival', Survived, Age, Sex, Class, sep='/'),
#' itemStyle= case_when(Survived=='Yes' ~"color='green'", TRUE ~"color='LightSalmon'")) |>
#' select(pathString, value, itemStyle)
#' ec.init(
#' series= list(list(
#' data= ec.data(df, format='treeTT'),
#' type= 'tree', symbolSize= ec.clmn("(x) => {return Math.log(x)*10}")
#' )),
#' tooltip= list(formatter= ec.clmn('%@<br>%@%','value','pct'))
#' )
#'
#' @importFrom utils tail
#' @importFrom grDevices boxplot.stats
#' @importFrom data.tree Aggregate
#' @export
ec.data <- function(df, format='dataset', header=FALSE, ...) {
stopifnot('ec.data: expecting parameter df'= !missing(df))
if (format=='dendrogram') {
stopifnot('ec.data: df should be hclust for dendrogram'= inherits(df, 'hclust'))
hc <- df
# decode hc$merge with hc$labels
inew <- list()
i <- 0
tmp <- apply(hc$merge, 1, \(x) {
fst <- if (x[1]<0) { if (is.null(hc$labels)) -x[1] else hc$labels[-x[1]] } else inew[[x[1]]]$p[1]
snd <- if (x[2]<0) { if (is.null(hc$labels)) -x[2] else hc$labels[-x[2]] } else inew[[x[2]]]$p[1]
i <<- i+1
inew <<- append(inew, list(
list(p= rep(paste0('p',i),2), c= c(fst, snd),
h= rep(round(hc$height[i], 2), 2))))
})
tmp <- unlist(inew)
parents <- children <- vals <- c()
for(i in 1:length(tmp)) {
fst <- substr(names(tmp[i]), 1, 1)
switch(fst,
'p'= parents <- c(parents, tmp[i]),
'c'= children <- c(children, tmp[i]),
'h'= vals <- c(vals, as.numeric(tmp[i]))
)
}
# add top element, required for tree chart
vals <- c(unname(vals), 1)
children <- c(unname(children), unname(tail(parents,1)))
parents <- c(unname(parents), '')
# convert from data.frame to JSON
dafr <- data.frame(parents=parents, children=children, value=vals)
tmp <- data.tree::FromDataFrameNetwork(dafr)
json <- data.tree::ToListExplicit(tmp, unname=TRUE)
return(json$children)
}
stopifnot('ec.data: df has to be data.frame'= inherits(df, 'data.frame'))
# save var for ec.clmn
.setColnm(colnames(df))
if (format=='treePC') {
# for sunburst,tree,treemap
if (# !all(colnames(df) == c('parents', 'children', 'value')) ||
!all(unlist(unname(lapply(as.list(df[,1:3]), class))) ==
c('character','character','numeric')) )
stop('ec.data: df columns need to be in order (parents, children, value), only value is numeric', call. = FALSE)
tryCatch({
tmp <- data.tree::FromDataFrameNetwork(df)
},
error= function(e) { stop(e) })
json <- data.tree::ToListExplicit(tmp, unname=TRUE)
return(json$children)
}
if (format %in% c('treeTT','treeTK')) {
# data for tree,sunburst,treemap from Titanic-like data
chNames <- function(lest) {
stopifnot('chNames: expecting a list'= inherits(lest, 'list'))
# recursive, build pct and itemStyle
cldrn <- lest$children
nm <- names(cldrn)
tot <- unlist(sapply(cldrn, '[[', 'value'))
if (!is.null(tot)) {
tot <- sum(sapply(cldrn, '[[', 'value'))
lest$value <- tot
}
#cat('\nnames:',nm,' ',tot)
cldrn <- unname(cldrn)
cnt <- 0
lest$children <- lapply(cldrn, \(x) {
cnt <<- cnt+1; x$name <- nm[cnt]
if (!is.null(tot)) x$pct <- round(x$value / tot * 100, 2)
if (!is.null(x$itemStyle))
x$itemStyle <- eval(parse(text=paste0('list(',x$itemStyle,')')))
if (!is.null(x$children)) x <- chNames(x)
x })
if (!is.null(lest$children[[1]]$itemStyle))
lest$itemStyle <- lest$children[[1]]$itemStyle
lest
}
# verify columns pathString, value, itemStyle
stopifnot('ec.data: df first columns not pathString,value'= c('pathString','value') %in% colnames(df))
stopifnot('ec.data: column value not numeric'= is.numeric(df$value))
tryCatch({
nod <- data.tree::FromDataFrameTable(df, ...)
},
error= function(e) { stop(e) })
nod$Do(function(x) x$value <- data.tree::Aggregate(x, "value", sum))
json <- data.tree::ToListExplicit(nod)
tmp <- chNames(json)
return(list(tmp))
}
rownames(df) <- NULL
n <- seq_along(df[[1]]) # assuming all lists in df have the same length
tmp <- lapply(n, \(i) lapply(df, "[[", i)) # preserve column types
if (format=='dataset') {
datset <- lapply(tmp, unname)
if (header)
datset <- c(list(colnames(df)), datset)
}
else if (format=='values' || isTRUE(format)) {
datset <- lapply(tmp, \(x) list(value=unlist(unname(x))))
}
else if (format=='boxplot') {
args <- list(...)
rady <- if ('ol.radius' %in% names(args)) args$ol.radius else NULL
jitter <- if ('jitter' %in% names(args)) args$jitter else 0
layout <- if ('layout' %in% names(args)) args$layout else 'h'
outliers <- if ('outliers' %in% names(args)) args$outliers else FALSE
cn <- colnames(df)
stopifnot('boxplot: df should have 2+ columns'= length(cn)>1)
colas <- cn[1]
colb5 <- cn[2]
stopifnot('boxplot: 2nd column must be numeric'= is.numeric(df[[colb5]]))
# is there another group beside colas ?
grpcol <- if (is.grouped_df(df) && group_vars(df)[1]!=colas)
group_vars(df)[1] else NULL
yaxis <- list(list(type= 'category', name=colas)) # default horiz layout
xaxis <- list(list(scale= TRUE, name=colb5))
ttcol <- 1
# category axis labels
if (is.factor(df[[colas]]))
axe <- paste(levels(df[[colas]]), collapse="','")
else
axe <- paste(sort(as.character(unique(df[[colas]]))), collapse="','")
# tbox <- "(p) => { d=p.data; out= '<b>'+p.seriesName+'</b>'+
# '<br>min '+d[1].toFixed(3)+ '<br>Q1 '+d[2].toFixed(3)+
# '<br>median '+d[3].toFixed(3)+ '<br>Q3 '+d[4].toFixed(3)+
# '<br>max '+d[5].toFixed(3); return out; }"
ttip <- c('Low', 'Q1', 'Q2', 'Q3', 'High')
if (!is.null(grpcol)) { # grouped
tmp <- df |> group_split()
dataset <- lapply(tmp, \(dd) {
dv <- dd |> arrange(.data[[colas]]) |>
group_by(.data[[colas]]) |> group_split()
src <- lapply(dv, \(vv) {
if (nrow(vv)<5) stop(paste0('ec.data: insufficient data in group "'
,grpcol,'"'), call.= FALSE)
vv[[colb5]]
})
list(source= if (length(src[[1]])==1) list(src) else src)
})
series <- list()
for (i in 1:length(tmp)) {
dataset <- append(dataset,
list(list( fromDatasetIndex= i-1, transform= list(type= 'boxplot'))))
series <- append(series, list(list(
name= tmp[[i]][[grpcol]][1],
#tooltip= list(formatter= tbox),
encode= list(tooltip= ttip),
type= 'boxplot', datasetIndex= i+length(tmp)-1) ))
}
axe <- paste0("function(v) { return ['",axe,"'][v]; }")
if (outliers) {
gcnt <- length(tmp) # group count
c2 <- gcnt+gcnt-1
# new datasets with outliers
dsotl <- lapply(gcnt:c2, \(x) list( fromDatasetIndex=x, fromTransformResult=1))
serol <- lapply((gcnt*2):(gcnt+c2), \(x)
list(type='custom',
datasetIndex=x, renderItem= htmlwidgets::JS('riOutliers'),
encode= list(x=2, y=1),
name=series[[x-c2]]$name, z=4,
itemStyle= list(borderDashOffset= rady)
))
if (layout=='v') {
serol <- lapply(serol, \(ss) {
e <- ss$encode; ss$encode <- list(x=e$y, y=e$x); ss })
}
dataset <- append(dataset, dsotl)
series <- append(series, serol) }
}
else { # non-grouped
bdf <- ungroup(df) |> arrange(.data[[colas]]) |>
group_by(across({colas})) |> group_split()
src <- lapply(bdf, \(x) {x[[colb5]]})
nms <- paste(unlist(lapply(bdf, \(x) {unique(x[[colas]])})), collapse="','")
nms <- paste0("(p) => ['",nms,"'][p.value]")
dataset <- list(
list(source= src),
list(transform= list(type= 'boxplot',
config= list(itemNameFormatter= htmlwidgets::JS(nms)
)))
)
series <- list(list(type='boxplot', name= 'boxplot',
datasetIndex= 1,
encode= list(y= 1, x= c(2,3,4,5,6), tooltip=ttip)
))
# default is horizontal, for vertical swap xAxis/yAxis category type
if (layout=='v') {
e <- series[[1]]$encode
series[[1]]$encode <- list(x=e$y, y=e$x, tooltip=ttip) # swap x & y
}
axe <- "function(v) { return v;}"
if (outliers) {
# new dataset with outliers and serie for it
dsotl <- list(list( fromDatasetIndex=1, fromTransformResult=1 ))
serol <- list(list(type='scatter',
datasetIndex=2, name=series[[1]]$name, z=4,
itemStyle= list(borderDashOffset= rady) ))
if (jitter==0) {
serol[[1]] <- .merlis(serol[[1]], args)
series[[1]] <- .merlis(series[[1]], args)
}
if (layout=='h')
serol[[1]]$encode <- list(x=2, y=1) # swap x & y
dataset <- append(dataset, dsotl)
series <- append(series, serol)
}
}
if (is.factor(df[[colas]]) || is.character(df[[colas]]))
yaxis[[1]] <- c(yaxis[[1]], list(axisLabel= list(formatter= htmlwidgets::JS(axe))))
if (layout=='v') {
swap <- xaxis; xaxis <- yaxis; yaxis <- swap; ttcol <- 2
}
if (jitter>0) {
tmp <- df |> arrange(.data[[colas]]) |>
group_by(.data[[colas]]) |> group_split()
mcyl <- lapply(tmp, \(x) unname(unlist(x[[colb5]])))
names(mcyl) <- sort(unique(df[[colas]]))
i <- 0.5
serj <- lapply(names(mcyl), \(nn) {
yy <- unname(unlist(mcyl[nn]))
xx <- jitter(rep(i, length(yy)), amount= jitter)
out <- list(type= 'scatter', ...)
if (!'name' %in% names(args)) out$name <- nn
if (!'large' %in% names(args)) out$large <- TRUE
#if (!'tooltip' %in% names(args)) out$tooltip <- list(formatter= ec.clmn(ttcol))
if (!'z' %in% names(args)) out$z <- 3
if (layout=='v') {
out$data <- do.call(Map, c(f = c, list(xx, yy)))
out$xAxisIndex <- 2
if (i==0.5) xaxis <<- append(xaxis,
list(list(max= length(mcyl), show=F)))
} else {
out$data <- do.call(Map, c(f = c, list(yy, xx)))
out$yAxisIndex <- 2
if (i==0.5) yaxis <<- append(yaxis,
list(list(max= length(mcyl), show=F)))
}
i <<- i + 1
out
})
series <- append(series, serj)
}
return(list(dataset= dataset, series= series, xAxis=xaxis, yAxis=yaxis))
}
else { # format=='names'
datset <- tmp
} # format=='names'
return(datset)
}
#' Data column format
#'
#' Helper function to display/format data column(s) by index or name
#'
#' @param col A single column index(number) or column name(quoted string), \cr
#' or a \link[base]{sprintf} string template for multiple indexes.\cr
#' NULL(default) for charts with single values like tree, pie.\cr
#' 'json' to display tooltip with all available values to choose from.\cr
#' 'log' to write all values in the JS console (F12) for debugging.\cr
#' Can contain JS function starting with _'function('_ (or format _'(x) => {}'_).\cr
#' @param ... Comma separated column indexes or names, only when \emph{col} is \emph{sprintf}. This allows formatting of multiple columns, as for a tooltip.\cr
#' @param scale A positive number, multiplier for numeric columns. When scale is 0, all numeric values are rounded.
#' @return A JavaScript code string (usually a function) marked as executable, see \link[htmlwidgets]{JS}.
#'
#' @details This function is useful for attributes like formatter, color, symbolSize, label.\cr
#' Column indexes are counted in R and start with 1.\cr
#' Omit _col_ or use index -1 for single values in tree/pie charts, \emph{axisLabel.formatter} or \emph{valueFormatter}. See [ec.data] dendrogram example.\cr
#' Column indexes are decimals for combo charts with multiple series, see [ecr.band] example. The whole number part is the serie index, the decimal part is the column index inside.\cr
#' \emph{col} as sprintf has the same placeholder \emph{%@} for both column indexes or column names.\cr
#' \emph{col} as sprintf can contain double quotes, but not single or backquotes.\cr
#' Template placeholders with formatting:\cr
#' * \emph{%@} will display column value as-is.\cr
#' * \emph{%L@} will display a number in locale format, like '12,345.09'.\cr
#' * \emph{%LR@} rounded number in locale format, like '12,345'.\cr
#' * \emph{%R@} rounded number, like '12345'.\cr
#' * \emph{%M@} marker in serie's color.\cr
#'
#' @examples
#' tmp <- data.frame(Species = as.vector(unique(iris$Species)),
#' emoji = c('A','B','C'))
#' df <- iris |> dplyr::inner_join(tmp) # add 6th column emoji
#' df |> dplyr::group_by(Species) |> ec.init(
#' series.param= list(label= list(show= TRUE, formatter= ec.clmn('emoji'))),
#' tooltip= list(formatter=
#' # with sprintf template + multiple column indexes
#' ec.clmn('%M@ species <b>%@</b><br>s.len <b>%@</b><br>s.wid <b>%@</b>', 5,1,2))
#' )
#'
#' @export
ec.clmn <- function(col=NULL, ..., scale=1) {
if (is.null(scale)) scale=1
if (scale==1) scl <- 'return c;'
else {
if (scale==0) scl <- 'return Math.round(c);'
else scl <- paste0('return (parseFloat(c)*',scale,');')
}
args <- list(...)
ret <- paste("pos=[]; c= String(typeof x=='object' ? x.value : x);", scl)
if (is.null(col)) {} # for pie,sunburst
else if (col=='log')
ret <- "console.log(x); return 'logged';"
else if (col=='json')
ret <- 'return JSON.stringify(x, null, " ").replace(/{/g,"<br>{").replace(/"value":/g,"<br> value:").replace(/"data":/g,"<br> data:").replace(/"seriesIndex":/g,"<br> seriesIndex:");'
else if (is.character(col) && (grepl(') =>', col) ||
startsWith(col, 'function(')))
return(htmlwidgets::JS(col))
else if (is.na(suppressWarnings(as.numeric(col)))) {
spf <- "var sprintf= (template, vals) => {
j=0; if (template=='%@') return vals[j++];
return template.replace(/%@|%L@|%LR@|%R@|%R2@|%M@/g, (m) => {
if (m=='%@') return vals[j++];
if (m=='%L@') return Number(vals[j++]).toLocaleString();
if (m=='%LR@') return Math.round(Number(vals[j++])).toLocaleString();
if (m=='%R@') return Math.round(Number(vals[j++]));
if (m=='%R2@') return Number(vals[j++]).toFixed(2);
if (m=='%M@') return x.marker;
}); };"
if (length(args)==0) { # col is solitary name
args <- col; col <- '%@' # replace
}
# col is sprintf
tmp <- suppressWarnings(as.numeric(args) -1)
if (all(is.na(tmp))) {
# multiple column names (non-numeric strings)
# to find position in colnames
tmp <- .getColnm()
stopifnot("ec.clmn: colnames missing.
Use ec.clmn after ec.data and/or inside ec.init(df).
Otherwise use column indexes instead of names."= !is.null(tmp))
spf <- paste0(spf, " pos=['", paste(tmp, collapse="','"), "'];")
t0 <- sapply(args, \(s) toString(paste0("x.data['", s,"']")) )
t0 <- paste(t0, collapse=',')
t1 <- paste(args, collapse='`,`')
# ec.data(df,'values'): x is array for size, x.data.value for tooltip
# x.data =
# 1) object when ec.data('names')
# 2) array only when ec.data('dataset') or df
# 3) x.data.value array with x.dimensionNames when ec.data('values')
# if series.dimensions=colnames(df) not set then x.dimensionNames may be wrong,
# like ['lng', 'lat', 'value', 'value0',...] console.log(x.dimensionNames);
# was if (x.dimensionNames && x.dimensionNames.length>0) pos= args.map(z => x.dimensionNames.indexOf(z)); else..
ret <- paste0( spf, "
aa= Array.isArray(x) ? x : x.data; tmp= null;
if (aa && aa instanceof Object && !Array.isArray(aa)) {
tmp= Object.keys(aa); if (tmp.length==1 && tmp[0]=='value') aa= x.data.value;}
if (tmp && tmp.length>1)
vv=[",t0,"];
else {
if (!aa || !aa.length) return `no data`;
args= [`",t1,"`];
pos= args.map(z => pos.indexOf(z));
vv= pos.map(p => aa[p]); }")
} # col.names
else {
# multiple numeric, they could be in x, x.data, x.value OR x[].value[]
# in combo-charts (ec.band), get decimal portion as .value[] index
tmp <- paste(tmp, collapse=',')
ret <- paste0( spf, "ss=[",tmp,"];
vv= ss.map((e) => {
if (e<0) return x.value ? x.value : x;
i= Math.floor(e);
return x.value!=null ? x.value[i] :
x.data!=null ? x.data[i] :
x[i]!=null ? x[i] : `no data` });
if (vv.length > 0)
vv = ss.map((e,idx) => {
if (typeof vv[idx] != 'object') return vv[idx];
f= Math.round(e % 1 *10) -1;
return vv[idx].value[f];
}); ") # multi-series 1.2, 3.1
} # col.indexes
if (scale >0) ret <- paste(ret,"vv= vv.map(e => isNaN(e) | !e ? e : e*",scale,");")
if (scale==0) ret <- paste(ret,"vv= vv.map(e => isNaN(e) | !e ? e : Math.round(e));")
# keep backwards-quotes for handling '\n'
ret <- paste0(ret, "c= sprintf(`",col,"`, vv); return c; ")
} # col is string
else { # col is solitary numeric
if (length(args) > 0)
warning('col is numeric, others are ignored', call.=FALSE)
col <- as.numeric(col) - 1 # from R to JS counting
if (col >= 0)
ret <- paste0('c= String(x.value!=null ? x.value[',col,
'] : x.data!=null ? x.data[',col,'] : x[',col,'] ); ',scl)
} # col is solitary numeric
ret <- gsub('\t',' ', gsub('\n',' ', ret, fixed=T), fixed=T)
htmlwidgets::JS(paste0('function(x) {', ret, '}'))
}
# ----------- Other utilities ----------------------
#' Parallel Axis
#'
#' Build 'parallelAxis' for a parallel chart
#'
#' @param dfwt An echarty widget OR a data.frame(regular or grouped)
#' @param cols A string vector with columns names in desired order
#' @param minmax Boolean to add max/min limits or not, default TRUE
#' @param ... Additional attributes for \href{https://echarts.apache.org/en/option.html#parallelAxis}{parallelAxis}.
#' @return A list, see format in \href{https://echarts.apache.org/en/option.html#parallelAxis}{parallelAxis}.
#' @details This function could be chained to _ec.init_ or used with a _data.frame_\cr
#' @examples
#' iris |> dplyr::group_by(Species) |> # chained
#' ec.init(ctype= 'parallel', series.param= list(lineStyle= list(width=3))) |>
#' ec.paxis(cols= c('Petal.Length','Petal.Width','Sepal.Width'))
#'
#' mtcars |> ec.init(ctype= 'parallel',
#' parallelAxis= ec.paxis(mtcars, cols= c('gear','cyl','hp','carb'), nameRotate= 45),
#' series.param= list(smooth= TRUE)
#' )
#'
#' @export
ec.paxis <- function(dfwt=NULL, cols=NULL, minmax=TRUE, ...) {
pax <- list(); grnm <- ''
if (inherits(dfwt, 'data.frame')) {
coln <- colnames(dfwt)
cfilter <- 1:length(coln)
if (is.grouped_df(dfwt)) {
# dont include grouping column (grnm)
grnm <- group_vars(dfwt)[[1]]
cfilter <- cfilter[!cfilter==match(grnm, colnames(dfwt))]
}
idf <- dfwt
}
else {
stopifnot('ec.paxis: dfwt has to be class echarty'= inherits(dfwt, 'echarty'))
coln <- unlist(dfwt$x$opts$dataset[[1]]$source[1])
cfilter <- 1:length(coln)
if (length(dfwt$x$opts$dataset) > 1) {
grnm <- dfwt$x$opts$dataset[[2]]$transform$config$dimension
cfilter <- cfilter[!cfilter==match(grnm, coln)]
}
idf <- as.data.frame(t(do.call(cbind, dfwt$x$opts$dataset[[1]]$source[(-1)])))
colnames(idf) <- coln
idf <- as.data.frame(apply(idf, 2, unlist, simplify=FALSE))
}
if (!is.null(cols)) {
stopifnot('ec.paxis: some cols not found'= all(cols %in% coln))
cfilter <- match(cols, coln)
}
for(i in cfilter) {
cn <- coln[i]
tmp <- list(dim= i-1, name= cn, ...) # JS count is -1
if (!is.numeric(idf[cn][[1]]))
tmp$type <- 'category'
else {
if (minmax) {
tmp$max <- max(idf[cn])
tmp$min <- min(idf[cn])
}
}
pax <- append(pax, list(tmp));
}
if (inherits(dfwt, 'data.frame'))
pax
else {
dfwt$x$opts$parallelAxis= pax
dfwt
}
}
#' Themes
#'
#' Apply a pre-built or custom coded theme to a chart
#'
#' @param wt An \code{echarty} widget as returned by [ec.init]
#' @param name Name of existing theme file (without extension), or name of custom theme defined in \code{code}.
#' @param code Custom theme as JSON formatted string, default NULL.
#' @return An \code{echarty} widget.
#'
#' @details Just a few built-in themes are included in folder \code{inst/themes}.\cr
#' Their names are dark, gray, jazz, dark-mushroom and macarons.\cr
#' The entire ECharts theme collection could be found \href{https://github.com/apache/echarts/tree/master/theme}{here} and files copied if needed.\cr
#' To create custom themes or view predefined ones, visit \href{https://echarts.apache.org/en/theme-builder.html}{this site}.
#'
#' @examples
#' mtcars |> ec.init() |> ec.theme('dark-mushroom')
#' cars |> ec.init() |> ec.theme('mine', code=
#' '{"color": ["green","#eeaa33"],
#' "backgroundColor": "lemonchiffon"}')
#'
#' @export
ec.theme <- function (wt, name, code= NULL)
{
stopifnot('ec.theme: name required'= !missing(name))
wt$x$theme <- name
if (!is.null(code))
wt$x$themeCode <- code
else {
wt$x$themeCode <- NULL
path <- system.file('themes', package= 'echarty')
dep <- htmltools::htmlDependency(
name= name,
version= '1.0.0', src= c(file= path),
script= paste0(name, '.js'))
wt$dependencies <- append(wt$dependencies, list(dep))
}
wt
}
#' Chart to JSON
#'
#' Convert chart to JSON string
#'
#' @param wt An \code{echarty} widget as returned by [ec.init]
#' @param target type of resulting value: \cr
#' \verb{ }'opts' - the htmlwidget _options_ as JSON (default)\cr
#' \verb{ }'full' - the _entire_ htmlwidget as JSON\cr
#' \verb{ }'data' - info about chart's embedded data (char vector)
#' @param ... Additional attributes to pass to \link[jsonlite]{toJSON}\cr
#' 'file' - optional file name to save to when target='full'\cr
#' @return A JSON string, except when \code{target} is 'data' - then
#' a character vector.
#'
#' @details Must be invoked or chained as last command.\cr
#' target='full' will export all JavaScript custom code, ready to be used on import.
#'
#' @examples
#' # extract JSON
#' json <- cars |> ec.init() |> ec.inspect()
#' json
#'
#' # get from JSON and modify plot
#' ec.fromJson(json) |> ec.theme('macarons')
#'
#' @export
ec.inspect <- function(wt, target='opts', ...) {
stopifnot("ec.inspect: target only 'opts', 'data' or 'full'"= target %in% c('opts','data','full'))
if (target=='full') {
jjwt <- jsonlite::serializeJSON(wt)
opts <- list(...)
if ('file' %in% names(opts)) {
fn <- opts$file
con <- file(fn,'wb'); write(jjwt, con); close(con)
return(paste('saved in',fn))
} else
return(jjwt)
}
opts <- wt$x$opts
if (target=='data') {
out <- list()
if (!is.null(opts$dataset))
out <- sapply(opts$dataset, \(d) {
if (!is.null(d$source[1]))
paste('dataset:',paste(unlist(d$source[1]), collapse=', '),
'rows=',length(d$source))
else if (!is.null(d$transform[1]))
gsub('"', "'", paste(d$transform, collapse=', '))
})
i <- 0
out <- append(out, sapply(opts$series, \(s) {
i <<- i+1
str <- paste0('serie',i,' name:',s$name)
if (!is.null(s$type)) str <- paste0(str, ' type:',s$type)
if (!is.null(s$dimensions)) str <- paste0(str, ' dim:',s$dimensions)
if (!is.null(s$datasetIndex)) str <- paste0(str, ' dsi:',s$datasetIndex)
if (!is.null(s$encode)) str <- paste0(str, ' enc:',paste(s$encode, collapse=', '))
if (!is.null(s$data))
str <- paste(str, gsub('"', "'", paste(s$data[1], collapse=', ')))
str
}))
return(unlist(out))
}
params <- list(...)
if ('pretty' %in% names(params) && !params$pretty)
tmp <- jsonlite::toJSON(opts, force=TRUE, auto_unbox=TRUE,
null='null', ...)
else # pretty by default
tmp <- jsonlite::toJSON(opts, force=TRUE, auto_unbox=TRUE,
null='null', pretty=TRUE, ...)
return(tmp)
}
#' JSON to chart
#'
#' Convert JSON string or file to chart
#'
#' @param txt Could be one of the following:\cr
#' \verb{ }class _url_, like \code{url('https://serv.us/cars.txt')}\cr
#' \verb{ }class _file_, like \code{file('c:/temp/cars.txt','rb')}\cr
#' \verb{ }class _json_, like \code{ec.inspect(p)}, for options or full\cr
#' \verb{ }class _character_, JSON string with options only, see example below\cr
#' @param ... Any attributes to pass to internal [ec.init] when _txt_ is options only
#' @return An _echarty_ widget.
#'
#' @details _txt_ could be either a list of options (x$opts) to be set by \href{https://echarts.apache.org/en/api.html#echartsInstance.setOption}{setOption},\cr
#' OR an entire _htmlwidget_ generated thru [ec.inspect] when _target='full'_.\cr
#' The latter imports all JavaScript functions defined by the user.
#'
#' @examples
#' txt <- '{
#' "xAxis": { "data": ["Mon", "Tue", "Wed"]}, "yAxis": { },
#' "series": { "type": "line", "data": [150, 230, 224] } }'
#' ec.fromJson(txt)
#'
#' # ec.fromJson('https://helgasoft.github.io/echarty/test/pfull.json')
#' @export
ec.fromJson <- function(txt, ...) {
recur <- \(opts) {
names <- names(opts)
for(k in seq_along(opts)) {
nn <- opts[[k]]
if (inherits(nn, 'list'))
opts[[k]] <- recur(opts[[k]]) # recursive
else if (
(!is.null(names) && names[[k]]=='renderItem') ||
(inherits(nn,'character') && length(nn)==1 &&
(grepl(') =>', nn) ||
startsWith(nn, 'function(') ||
startsWith(nn, 'new echarts.')))) {
opts[[k]] <- htmlwidgets::JS(opts[[k]])
}
}
opts
}
if (inherits(txt, c('url','file')))
return(jsonlite::unserializeJSON(txt))
if (inherits(txt, 'character')) {
if (any(startsWith(txt, c('http://','https://'))))
return(jsonlite::unserializeJSON(url(txt)))
} else if (inherits(txt, 'json')) {
if (grepl('preRenderHook',txt))
return(jsonlite::unserializeJSON(txt))
} else
stop(paste0("ec.fromJson: unknown class '",class(txt),"'"))
tmp <- jsonlite::fromJSON(txt, simplifyVector = FALSE)
# options only
obj <- ec.init(...)
obj$x$opts <- recur(tmp)
obj
}
#' ------------- Licence -----------------
#'
#' Original work Copyright 2023 Larry Helgason
#'
#' Licensed under the Apache License, Version 2.0 (the "License");
#' you may not use this file except in compliance with the License.
#' You may obtain a copy of the License at
#'
#' http://www.apache.org/licenses/LICENSE-2.0
#'
#' Unless required by applicable law or agreed to in writing, software
#' distributed under the License is distributed on an "AS IS" BASIS,
#' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#' See the License for the specific language governing permissions and
#' limitations under the License.
#' ---------------------------------------
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