R/geom_dotglyph.R
In aravind-j/gglyph: Multivariate Data Visualization using Glyphs
Defines functions
makeContent.dotglyphtree
geom_dotglyph
Documented in
geom_dotglyph
#' Add Dot Profile Glyphs as a Scatterplot
#'
#' The dotglyph geom is used to plot multivariate data as dot profile glyphs
#' \insertCite{chambers_graphical_1983,dutoit_graphical_1986}{gglyph} in a
#' scatterplot.
#'
#' @template fill.gradient-arg
#' @template repel-arg
#' @inheritParams ggplot2::layer
#' @inheritParams starglyphGrob
#' @inheritParams dotglyphGrob
#' @param cols Name of columns specifying the variables to be plotted in the
#' glyphs as a character vector.
#' @param fill.dot The fill colour of the stacked dots.
#' @param linewidth The line width of the dot glyphs.
#' @param ... Other arguments passed on to \code{\link[ggplot2]{layer}()}. These
#' are often aesthetics, used to set an aesthetic to a fixed value, like
#' \code{colour = "green"} or \code{size = 3}. They may also be parameters to
#' the paired geom/stat.
#'
#' @section Aesthetics: \code{geom_dotglyph()} understands the following
#' aesthetics (required aesthetics are in bold): \itemize{ \item{\strong{x}}
#' \item{\strong{y}} \item{alpha} \item{colour} \item{fill} \item{group} }
#'
#' See \code{vignette("ggplot2-specs", package = "ggplot2")} for further
#' details on setting these aesthetics.
#'
#' The following additional aesthetics are considered if \code{repel = TRUE}:
#' \itemize{ \item{point.size} \item{segment.linetype} \item{segment.colour}
#' \item{segment.size} \item{segment.alpha} \item{segment.curvature}
#' \item{segment.angle} \item{segment.ncp} \item{segment.shape}
#' \item{segment.square} \item{segment.squareShape} \item{segment.inflect}
#' \item{segment.debug} }
#'
#' See \code{ggrepel}
#' \href{https://ggrepel.slowkow.com/articles/examples.html}{examples} page
#' for further details on setting these aesthetics.
#'
#' @family geoms
#'
#' @return A \code{geom} layer.
#'
#' @importFrom rlang as_quosures syms
#' @importFrom utils modifyList
#' @importFrom ggplot2 layer ggproto aes
#' @importFrom grid grobTree addGrob makeContent gTree setChildren
#' @importFrom Rdpack reprompt
#' @export
#'
#' @seealso \code{\link[gglyph]{dotglyphGrob}}
#'
#' @references
#'
#' \insertAllCited{}
#'
#' @examples
#'
#' # Convert data to classes
#' zs <- c("hp", "drat", "wt", "qsec", "vs", "am", "gear", "carb")
#'
#' mtcars[ , zs] <- lapply(mtcars[, zs],
#' function(x) cut(x, breaks = 5,
#' labels = c(1, 2, 3, 4, 5)))
#' mtcars[ , zs] <- lapply(mtcars[ , zs], as.factor)
#'
#' mtcars$cyl <- as.factor(mtcars$cyl)
#' mtcars$lab <- row.names(mtcars)
#'
#' library(ggplot2)
#' theme_set(theme_bw())
#' options(ggplot2.discrete.colour = RColorBrewer::brewer.pal(8, "Dark2"))
#' options(ggplot2.discrete.fill = RColorBrewer::brewer.pal(8, "Dark2"))
#'
#' # Mapped fill
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Mapped colour
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Different fill colours
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Gradient fill
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.gradient = "Greens",
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.gradient = "Blues",
#' mirror = FALSE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' fill.gradient = "RdYlBu",
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' fill.gradient = "viridis",
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Faceted
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.gradient = "viridis",
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' # Repel glyphs
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp, colour = cyl)) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp, colour = cyl)) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp)) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp)) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' fill.gradient = "viridis",
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
geom_dotglyph <- function(mapping = NULL, data = NULL, stat = "identity",
position = "identity", ...,
cols = character(0L),
radius = 1,
fill.dot = NULL,
fill.gradient = NULL,
linewidth = 1,
mirror = TRUE,
flip.axes = FALSE,
show.legend = NA,
repel = FALSE,
repel.control = gglyph.repel.control(),
inherit.aes = TRUE) {
# Modify mapping to include cols
mcols <- rlang::as_quosures(rlang::syms(cols), .GlobalEnv)
names(mcols) <- cols
mapping <- modifyList(mapping, mcols)
params <- list(
radius = radius,
flip.axes = flip.axes,
mirror = mirror,
fill.dot = fill.dot,
fill.gradient = fill.gradient,
linewidth = linewidth,
cols = cols,
repel = repel,
box.padding = unit(repel.control$box.padding, "lines"),
point.padding = unit(repel.control$point.padding, "lines"),
min.segment.length = unit(repel.control$min.segment.length, "lines"),
arrow = repel.control$arrow,
force = repel.control$force,
force_pull = repel.control$force_pull,
max.time = repel.control$max.time,
max.iter = repel.control$max.iter,
max.overlaps = repel.control$max.overlaps,
nudge_x = repel.control$nudge_x,
nudge_y = repel.control$nudge_y,
xlim = repel.control$xlim,
ylim = repel.control$ylim,
direction = repel.control$direction,
seed = repel.control$seed,
verbose = repel.control$verbose,
...)
# Modify geom aesthetics to include cols
geomout <- GeomDotGlyph
geomout$required_aes <- c(geomout$required_aes, cols)
ggplot2::layer(
data = data,
mapping = mapping,
stat = stat,
geom = geomout,
position = position,
show.legend = show.legend,
inherit.aes = inherit.aes,
params = params)
}
GeomDotGlyph <- ggplot2::ggproto("GeomDotGlyph", ggplot2::Geom,
required_aes = c("x", "y"),
default_aes = ggplot2::aes(colour = "black",
fill = NA,
alpha = 1,
# repel aes
point.size = 1,
segment.linetype = 1,
segment.colour = NULL,
segment.size = 0.5,
segment.alpha = NULL,
segment.curvature = -1e-20,
segment.angle = 20,
segment.ncp = 3,
segment.shape = 0.5,
segment.square = TRUE,
segment.squareShape = 1,
segment.inflect = FALSE,
segment.debug = FALSE),
draw_key = ggplot2::draw_key_polygon,
setup_params = function(data, params) {
params
},
setup_data = function(data, params) {
cols <- params$cols
# Check if "cols" exist in data
if (FALSE %in% (cols %in% colnames(data))) {
stop(paste('The following column(s) specified as "cols" are not present in "data":\n',
paste(cols[!(cols %in% colnames(data))],
collapse = ", "),
sep = ""))
}
# Check if cols are numeric or factor
intfactcols <- unlist(lapply(data[, cols],
function(x) FALSE %in% (is.vector(x, mode = "integer") |
is.vector(x, mode = "numeric") |
is.factor(x))))
if (TRUE %in% intfactcols) {
stop('The following column(s) specified as "cols" in ',
'"data" are not of type numeric, integer or factor:\n',
paste(names(intfactcols[intfactcols]), collapse = ", "))
}
# Remove rows with missing values in "cols"
# check for missing values
missvcols <- unlist(lapply(data[, cols], function(x) TRUE %in% is.na(x)))
if (TRUE %in% missvcols) {
warning(paste('The following column(s) in "data" have missing values:\n',
paste(names(missvcols[missvcols]), collapse = ", ")))
data <- remove_missing(df = data, vars = cols)
}
# Check if fill.dot are valid
if (!is.null(params$fill.dot)) {
if (length(params$fill.dot) != length(cols))
stop('The number of colours specified in',
'"fill.dot" are not equal to the number',
'of variables specified in "cols".')
if (!all(iscolour(params$fill.dot))) {
stop('Invalid colour(s) specified in "fill.dot".')
}
data$colour <- NULL
}
data$linewidth <- params$linewidth
data
},
draw_panel = function(data, panel_params,
coord, cols,
radius,
fill.dot,
fill.gradient,
flip.axes,
linewidth,
mirror,
repel,
point.size,
box.padding,
point.padding,
min.segment.length,
arrow,
force,
force_pull,
max.time,
max.iter,
max.overlaps,
nudge_x,
nudge_y,
xlim,
ylim,
direction,
seed,
verbose) {
# if needed rename columns using our convention
for (this_dim in c("x", "y")) {
this_orig <- sprintf("%s_orig", this_dim)
this_nudge <- sprintf("nudge_%s", this_dim)
if (!this_nudge %in% colnames(data)) {
data[[this_nudge]] <- data[[this_dim]]
if (this_orig %in% colnames(data)) {
data[[this_dim]] <- data[[this_orig]]
data[[this_orig]] <- NULL
}
}
}
# Transform the nudges to the panel scales.
nudges <- data.frame(x = data$nudge_x, y = data$nudge_y)
nudges <- coord$transform(nudges, panel_params)
data <- coord$transform(data, panel_params)
# Convert factor columns to equivalent numeric
fcols <- names(Filter(is.factor, data[, cols]))
if (length(fcols) > 0) {
data[, fcols] <- lapply(data[, cols], function(f) as.numeric(levels(f))[f])
}
# Gradient colour mapping
gdata <- NULL
if (is.null(fill.dot) & !is.null(fill.gradient)) {
gdata <- data[, cols]
gdata <- lapply(gdata,
function(x) scales::col_numeric(palette = fill.gradient,
domain = min(x):max(x))(x))
gdata <- data.frame(gdata)
}
# The nudge is relative to the data.
data$nudge_x <- nudges$x - data$x
data$nudge_y <- nudges$y - data$y
# Transform limits to panel scales.
limits <- data.frame(x = xlim, y = ylim)
limits <- coord$transform(limits, panel_params)
# Allow Inf.
if (length(limits$x) == length(xlim)) {
limits$x[is.infinite(xlim)] <- xlim[is.infinite(xlim)]
}
if (length(limits$y) == length(ylim)) {
limits$y[is.infinite(ylim)] <- ylim[is.infinite(ylim)]
}
# Fill NAs with defaults.
limits$x[is.na(limits$x)] <- c(0, 1)[is.na(limits$x)]
limits$y[is.na(limits$y)] <- c(0, 1)[is.na(limits$y)]
ggname("geom_dotglyph",
grid::gTree(data=data,
# x = x, y = y,
cols=cols,
# fill = fill,
radius = radius,
mirror = mirror,
flip.axes = flip.axes,
fill.dot = fill.dot,
fill.gradient = fill.gradient,
gdata = gdata,
# colour = colour,
# alpha = alpha,
linewidth = linewidth,
repel = repel,
limits = limits,
box.padding = box.padding,
point.padding = point.padding,
min.segment.length = min.segment.length,
arrow = arrow,
force = force,
force_pull = force_pull,
max.time = max.time,
max.iter = max.iter,
max.overlaps = max.overlaps,
nudge_x = nudge_x,
nudge_y = nudge_y,
xlim = xlim,
ylim = ylim,
direction = direction,
seed = seed,
verbose = verbose,
cl="dotglyphtree"))
# ggname("geom_dotglyph",
# grid::gTree(
# children = grid::gList(
# grid::pointsGrob(x = data$x,
# y = data$y,
# default.units = "native",
# pch = 20,
# gp = grid::gpar(col = data$colour,
# fill = data$fill))
# )))
}
)
#' grid::makeContent function for the grobTree of dotglyphGrob objects
#' @param g A grid grobTree.
#' @export
#' @noRd
makeContent.dotglyphtree <- function(g) {
if (g$repel) {
repel.debug <- getOption("gglyph.repel.debug", default = FALSE)
# The padding around each bounding box.
box_padding_x <- grid::convertWidth(g$box.padding, "native", valueOnly = TRUE)
box_padding_y <- grid::convertHeight(g$box.padding, "native", valueOnly = TRUE)
# The padding around each point.
if (is.na(g$point.padding)) {
g$point.padding = unit(0, "lines")
}
# Minimal Original glyph grob
glorg <- lapply(seq_along(g$data$x),
function(i) dotglyphGrob(x = g$data$x[i],
y = g$data$y[i],
z = unlist(g$data[i, g$cols]),
radius = g$radius,
mirror = g$mirror,
flip.axes = g$flip.axes,
col = "gray"))
# Create a dataframe with x1 y1 x2 y2 - Computed from bounding box
boxes <- lapply(seq_along(glorg), function(i) {
x1 <- grid::convertWidth(grid::grobX(glorg[[i]], "west"), "native", TRUE)
x2 <- grid::convertWidth(grid::grobX(glorg[[i]], "east"), "native", TRUE)
y1 <- grid::convertHeight(grid::grobY(glorg[[i]], "south"), "native", TRUE)
y2 <- grid::convertHeight(grid::grobY(glorg[[i]], "north"), "native", TRUE)
# x1 <- grid::convertWidth(boxdim(glorg[[i]]$x, "min"), "native", TRUE)
# x2 <- grid::convertWidth(boxdim(glorg[[i]]$x, "max"), "native", TRUE)
# y1 <- grid::convertHeight(boxdim(glorg[[i]]$y, "min"), "native", TRUE)
# y2 <- grid::convertHeight(boxdim(glorg[[i]]$y, "max"), "native", TRUE)
c(
"x1" = x1 - box_padding_x + g$nudge_x,
"y1" = y1 - box_padding_y + g$nudge_y,
"x2" = x2 + box_padding_x + g$nudge_x,
"y2" = y2 + box_padding_y + g$nudge_y
)
})
if (repel.debug) {
# Bounding box grob
boxes2 <- data.frame(do.call(rbind, boxes))
# bboxg <- lapply(seq_along(boxes2$x1), function(i) {
# grid::polylineGrob(x = c(boxes2$x1[i], g$data$x[i], boxes2$x2[i], g$data$x[i], boxes2$x1[i]),
# y = c(g$data$y[i], boxes2$y1[i], g$data$y[i], boxes2$y2[i], g$data$y[i]),
# gp = gpar(col = "grey"))
# })
bboxg <- lapply(seq_along(boxes2$x1), function(i) {
grid::polylineGrob(x = c(boxes2$x1[i], boxes2$x1[i], boxes2$x2[i], boxes2$x2[i], boxes2$x1[i]),
y = c(boxes2$y1[i], boxes2$y2[i], boxes2$y2[i], boxes2$y1[i], boxes2$y1[i]),
gp = gpar(col = "gray"))
})
}
# Make the repulsion reproducible if desired.
if (is.null(g$seed) || !is.na(g$seed)) {
set.seed(g$seed)
}
# The points are represented by circles.
g$data$point.size[is.na(g$data$point.size)] <- 0
# Beware the magic numbers. I do not understand them.
# I just accept them as necessary to get the code to work.
p_width <- grid::convertWidth(unit(1, "npc"), "inch", TRUE)
p_height <- grid::convertHeight(unit(1, "npc"), "inch", TRUE)
p_ratio <- (p_width / p_height)
if (p_ratio > 1) {
p_ratio <- p_ratio ^ (1 / (1.15 * p_ratio))
}
point_size <- p_ratio * grid::convertWidth(
grid::unit(g$data$point.size, "lines"), "native", valueOnly = TRUE
) / 13
point_padding <- p_ratio * grid::convertWidth(
grid::unit(g$point.padding, "lines"), "native", valueOnly = TRUE
) / 13
# Repel overlapping bounding boxes away from each other.
repel <- repel_boxes2(
data_points = as.matrix(g$data[,c("x","y")]),
point_size = point_size,
point_padding_x = point_padding,
point_padding_y = point_padding,
boxes = do.call(rbind, boxes),
xlim = range(g$limits$x),
ylim = range(g$limits$y),
hjust = rep (0.5, nrow(g$data)),
vjust = rep (0.5, nrow(g$data)),
force_push = g$force * 1e-6,
force_pull = g$force_pull * 1e-2,
max_time = g$max.time,
max_iter = ifelse(is.infinite(g$max.iter), 1e9, g$max.iter),
max_overlaps = g$max.overlaps,
direction = g$direction,
verbose = g$verbose
)
if (any(repel$too_many_overlaps)) {
warning(sum(repel$too_many_overlaps, na.rm = TRUE),
' glyphs have too many overlaps.\nConsider increasing "max.overlaps"')
}
# if (all(repel$too_many_overlaps)) {
# grobs <- list()
# class(grobs) <- "gList"
# return(setChildren(x, grobs))
# }
# create segment grobs
segg <- lapply(seq_along(g$data$x), function(i) {
if (!repel$too_many_overlaps[i]) {
row <- g$data[i, , drop = FALSE]
grid::curveGrob(x1 = repel[i,]$x, y1 = repel[i,]$y, x2 = row$x, y2 = row$y,
default.units = "native",
curvature = row$segment.curvature,
angle = row$segment.angle,
ncp = row$segment.ncp,
shape = row$segment.shape,
square = row$segment.square,
squareShape = row$segment.squareShape,
inflect = row$segment.inflect,
debug = row$segment.debug,
gp = gpar(col = row$segment.colour,
lwd = row$segment.size * ggplot2::.pt,
lty = row$segment.linetype),
arrow = row$arrow)
} else {
grid::nullGrob()
}
})
}
gl <- lapply(seq_along(g$data$x),
function(i) dotglyphGrob(x = if (g$repel) {
repel$x[i]
} else {
g$data$x[i]
},
y = if (g$repel) {
repel$y[i]
} else {
g$data$y[i]
},
z = unlist(g$data[i, g$cols]),
radius = g$radius,
mirror = g$mirror,
flip.axes = g$flip.axes,
fill = if (is.null(g$fill.dot)) {
if (!is.null(g$fill.gradient)) {
unlist(mapply(function(a, b) rep(a, b),
unlist(g$gdata[i, ]),
round(unlist(g$data[i, g$cols]))))
} else {
g$data$fill[i]
}
} else {
unlist(mapply(function(a, b) rep(a, b),
g$fill.dot,
round(unlist(g$data[i, g$cols]))))
},
col = g$data$colour[i],
lwd = g$data$linewidth[i],
alpha = g$data$alpha[i]))
if (g$repel) {
gl <- lapply(gl, grobTree)
if (repel.debug) {
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], glorg[[i]]))
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], bboxg[[i]]))
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], segg[[i]]))
# reorder grobs
gl <- lapply(seq_along(gl),
function(i) grid::reorderGrob(gl[[i]], c(2:4, 1:3)))
} else {
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], segg[[i]]))
# reorder grobs
gl <- lapply(seq_along(gl),
function(i) grid::reorderGrob(gl[[i]], c(2, 1)))
}
}
gl <- do.call(grid::gList, gl)
grid::setChildren(g, gl)
}
aravind-j/gglyph documentation built on Aug. 2, 2022, 12:30 a.m.
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Defines functions makeContent.dotglyphtree geom_dotglyph
Documented in geom_dotglyph
#' Add Dot Profile Glyphs as a Scatterplot
#'
#' The dotglyph geom is used to plot multivariate data as dot profile glyphs
#' \insertCite{chambers_graphical_1983,dutoit_graphical_1986}{gglyph} in a
#' scatterplot.
#'
#' @template fill.gradient-arg
#' @template repel-arg
#' @inheritParams ggplot2::layer
#' @inheritParams starglyphGrob
#' @inheritParams dotglyphGrob
#' @param cols Name of columns specifying the variables to be plotted in the
#' glyphs as a character vector.
#' @param fill.dot The fill colour of the stacked dots.
#' @param linewidth The line width of the dot glyphs.
#' @param ... Other arguments passed on to \code{\link[ggplot2]{layer}()}. These
#' are often aesthetics, used to set an aesthetic to a fixed value, like
#' \code{colour = "green"} or \code{size = 3}. They may also be parameters to
#' the paired geom/stat.
#'
#' @section Aesthetics: \code{geom_dotglyph()} understands the following
#' aesthetics (required aesthetics are in bold): \itemize{ \item{\strong{x}}
#' \item{\strong{y}} \item{alpha} \item{colour} \item{fill} \item{group} }
#'
#' See \code{vignette("ggplot2-specs", package = "ggplot2")} for further
#' details on setting these aesthetics.
#'
#' The following additional aesthetics are considered if \code{repel = TRUE}:
#' \itemize{ \item{point.size} \item{segment.linetype} \item{segment.colour}
#' \item{segment.size} \item{segment.alpha} \item{segment.curvature}
#' \item{segment.angle} \item{segment.ncp} \item{segment.shape}
#' \item{segment.square} \item{segment.squareShape} \item{segment.inflect}
#' \item{segment.debug} }
#'
#' See \code{ggrepel}
#' \href{https://ggrepel.slowkow.com/articles/examples.html}{examples} page
#' for further details on setting these aesthetics.
#'
#' @family geoms
#'
#' @return A \code{geom} layer.
#'
#' @importFrom rlang as_quosures syms
#' @importFrom utils modifyList
#' @importFrom ggplot2 layer ggproto aes
#' @importFrom grid grobTree addGrob makeContent gTree setChildren
#' @importFrom Rdpack reprompt
#' @export
#'
#' @seealso \code{\link[gglyph]{dotglyphGrob}}
#'
#' @references
#'
#' \insertAllCited{}
#'
#' @examples
#'
#' # Convert data to classes
#' zs <- c("hp", "drat", "wt", "qsec", "vs", "am", "gear", "carb")
#'
#' mtcars[ , zs] <- lapply(mtcars[, zs],
#' function(x) cut(x, breaks = 5,
#' labels = c(1, 2, 3, 4, 5)))
#' mtcars[ , zs] <- lapply(mtcars[ , zs], as.factor)
#'
#' mtcars$cyl <- as.factor(mtcars$cyl)
#' mtcars$lab <- row.names(mtcars)
#'
#' library(ggplot2)
#' theme_set(theme_bw())
#' options(ggplot2.discrete.colour = RColorBrewer::brewer.pal(8, "Dark2"))
#' options(ggplot2.discrete.fill = RColorBrewer::brewer.pal(8, "Dark2"))
#'
#' # Mapped fill
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Mapped colour
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Different fill colours
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Gradient fill
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.gradient = "Greens",
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.gradient = "Blues",
#' mirror = FALSE,
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' fill.gradient = "RdYlBu",
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' fill.gradient = "viridis",
#' alpha = 0.8) +
#' ylim(c(-0, 550))
#'
#' # Faceted
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' ggplot(data = mtcars) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' fill.gradient = "viridis",
#' alpha = 0.8) +
#' ylim(c(-0, 550)) +
#' facet_grid(. ~ cyl)
#'
#' # Repel glyphs
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp, colour = cyl)) +
#' geom_dotglyph(aes(x = mpg, y = disp, fill = cyl),
#' cols = zs, radius = 0.5,
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp, colour = cyl)) +
#' geom_dotglyph(aes(x = mpg, y = disp, colour = cyl),
#' cols = zs, radius = 0.5,
#' mirror = FALSE,
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp)) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' flip.axes = TRUE,
#' fill.dot = RColorBrewer::brewer.pal(8, "Dark2"),
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
#' ggplot(data = mtcars) +
#' geom_point(aes(x = mpg, y = disp)) +
#' geom_dotglyph(aes(x = mpg, y = disp),
#' cols = zs, radius = 0.5,
#' mirror = FALSE, flip.axes = TRUE,
#' fill.gradient = "viridis",
#' alpha = 1, repel = TRUE) +
#' ylim(c(-0, 550))
#'
geom_dotglyph <- function(mapping = NULL, data = NULL, stat = "identity",
position = "identity", ...,
cols = character(0L),
radius = 1,
fill.dot = NULL,
fill.gradient = NULL,
linewidth = 1,
mirror = TRUE,
flip.axes = FALSE,
show.legend = NA,
repel = FALSE,
repel.control = gglyph.repel.control(),
inherit.aes = TRUE) {
# Modify mapping to include cols
mcols <- rlang::as_quosures(rlang::syms(cols), .GlobalEnv)
names(mcols) <- cols
mapping <- modifyList(mapping, mcols)
params <- list(
radius = radius,
flip.axes = flip.axes,
mirror = mirror,
fill.dot = fill.dot,
fill.gradient = fill.gradient,
linewidth = linewidth,
cols = cols,
repel = repel,
box.padding = unit(repel.control$box.padding, "lines"),
point.padding = unit(repel.control$point.padding, "lines"),
min.segment.length = unit(repel.control$min.segment.length, "lines"),
arrow = repel.control$arrow,
force = repel.control$force,
force_pull = repel.control$force_pull,
max.time = repel.control$max.time,
max.iter = repel.control$max.iter,
max.overlaps = repel.control$max.overlaps,
nudge_x = repel.control$nudge_x,
nudge_y = repel.control$nudge_y,
xlim = repel.control$xlim,
ylim = repel.control$ylim,
direction = repel.control$direction,
seed = repel.control$seed,
verbose = repel.control$verbose,
...)
# Modify geom aesthetics to include cols
geomout <- GeomDotGlyph
geomout$required_aes <- c(geomout$required_aes, cols)
ggplot2::layer(
data = data,
mapping = mapping,
stat = stat,
geom = geomout,
position = position,
show.legend = show.legend,
inherit.aes = inherit.aes,
params = params)
}
GeomDotGlyph <- ggplot2::ggproto("GeomDotGlyph", ggplot2::Geom,
required_aes = c("x", "y"),
default_aes = ggplot2::aes(colour = "black",
fill = NA,
alpha = 1,
# repel aes
point.size = 1,
segment.linetype = 1,
segment.colour = NULL,
segment.size = 0.5,
segment.alpha = NULL,
segment.curvature = -1e-20,
segment.angle = 20,
segment.ncp = 3,
segment.shape = 0.5,
segment.square = TRUE,
segment.squareShape = 1,
segment.inflect = FALSE,
segment.debug = FALSE),
draw_key = ggplot2::draw_key_polygon,
setup_params = function(data, params) {
params
},
setup_data = function(data, params) {
cols <- params$cols
# Check if "cols" exist in data
if (FALSE %in% (cols %in% colnames(data))) {
stop(paste('The following column(s) specified as "cols" are not present in "data":\n',
paste(cols[!(cols %in% colnames(data))],
collapse = ", "),
sep = ""))
}
# Check if cols are numeric or factor
intfactcols <- unlist(lapply(data[, cols],
function(x) FALSE %in% (is.vector(x, mode = "integer") |
is.vector(x, mode = "numeric") |
is.factor(x))))
if (TRUE %in% intfactcols) {
stop('The following column(s) specified as "cols" in ',
'"data" are not of type numeric, integer or factor:\n',
paste(names(intfactcols[intfactcols]), collapse = ", "))
}
# Remove rows with missing values in "cols"
# check for missing values
missvcols <- unlist(lapply(data[, cols], function(x) TRUE %in% is.na(x)))
if (TRUE %in% missvcols) {
warning(paste('The following column(s) in "data" have missing values:\n',
paste(names(missvcols[missvcols]), collapse = ", ")))
data <- remove_missing(df = data, vars = cols)
}
# Check if fill.dot are valid
if (!is.null(params$fill.dot)) {
if (length(params$fill.dot) != length(cols))
stop('The number of colours specified in',
'"fill.dot" are not equal to the number',
'of variables specified in "cols".')
if (!all(iscolour(params$fill.dot))) {
stop('Invalid colour(s) specified in "fill.dot".')
}
data$colour <- NULL
}
data$linewidth <- params$linewidth
data
},
draw_panel = function(data, panel_params,
coord, cols,
radius,
fill.dot,
fill.gradient,
flip.axes,
linewidth,
mirror,
repel,
point.size,
box.padding,
point.padding,
min.segment.length,
arrow,
force,
force_pull,
max.time,
max.iter,
max.overlaps,
nudge_x,
nudge_y,
xlim,
ylim,
direction,
seed,
verbose) {
# if needed rename columns using our convention
for (this_dim in c("x", "y")) {
this_orig <- sprintf("%s_orig", this_dim)
this_nudge <- sprintf("nudge_%s", this_dim)
if (!this_nudge %in% colnames(data)) {
data[[this_nudge]] <- data[[this_dim]]
if (this_orig %in% colnames(data)) {
data[[this_dim]] <- data[[this_orig]]
data[[this_orig]] <- NULL
}
}
}
# Transform the nudges to the panel scales.
nudges <- data.frame(x = data$nudge_x, y = data$nudge_y)
nudges <- coord$transform(nudges, panel_params)
data <- coord$transform(data, panel_params)
# Convert factor columns to equivalent numeric
fcols <- names(Filter(is.factor, data[, cols]))
if (length(fcols) > 0) {
data[, fcols] <- lapply(data[, cols], function(f) as.numeric(levels(f))[f])
}
# Gradient colour mapping
gdata <- NULL
if (is.null(fill.dot) & !is.null(fill.gradient)) {
gdata <- data[, cols]
gdata <- lapply(gdata,
function(x) scales::col_numeric(palette = fill.gradient,
domain = min(x):max(x))(x))
gdata <- data.frame(gdata)
}
# The nudge is relative to the data.
data$nudge_x <- nudges$x - data$x
data$nudge_y <- nudges$y - data$y
# Transform limits to panel scales.
limits <- data.frame(x = xlim, y = ylim)
limits <- coord$transform(limits, panel_params)
# Allow Inf.
if (length(limits$x) == length(xlim)) {
limits$x[is.infinite(xlim)] <- xlim[is.infinite(xlim)]
}
if (length(limits$y) == length(ylim)) {
limits$y[is.infinite(ylim)] <- ylim[is.infinite(ylim)]
}
# Fill NAs with defaults.
limits$x[is.na(limits$x)] <- c(0, 1)[is.na(limits$x)]
limits$y[is.na(limits$y)] <- c(0, 1)[is.na(limits$y)]
ggname("geom_dotglyph",
grid::gTree(data=data,
# x = x, y = y,
cols=cols,
# fill = fill,
radius = radius,
mirror = mirror,
flip.axes = flip.axes,
fill.dot = fill.dot,
fill.gradient = fill.gradient,
gdata = gdata,
# colour = colour,
# alpha = alpha,
linewidth = linewidth,
repel = repel,
limits = limits,
box.padding = box.padding,
point.padding = point.padding,
min.segment.length = min.segment.length,
arrow = arrow,
force = force,
force_pull = force_pull,
max.time = max.time,
max.iter = max.iter,
max.overlaps = max.overlaps,
nudge_x = nudge_x,
nudge_y = nudge_y,
xlim = xlim,
ylim = ylim,
direction = direction,
seed = seed,
verbose = verbose,
cl="dotglyphtree"))
# ggname("geom_dotglyph",
# grid::gTree(
# children = grid::gList(
# grid::pointsGrob(x = data$x,
# y = data$y,
# default.units = "native",
# pch = 20,
# gp = grid::gpar(col = data$colour,
# fill = data$fill))
# )))
}
)
#' grid::makeContent function for the grobTree of dotglyphGrob objects
#' @param g A grid grobTree.
#' @export
#' @noRd
makeContent.dotglyphtree <- function(g) {
if (g$repel) {
repel.debug <- getOption("gglyph.repel.debug", default = FALSE)
# The padding around each bounding box.
box_padding_x <- grid::convertWidth(g$box.padding, "native", valueOnly = TRUE)
box_padding_y <- grid::convertHeight(g$box.padding, "native", valueOnly = TRUE)
# The padding around each point.
if (is.na(g$point.padding)) {
g$point.padding = unit(0, "lines")
}
# Minimal Original glyph grob
glorg <- lapply(seq_along(g$data$x),
function(i) dotglyphGrob(x = g$data$x[i],
y = g$data$y[i],
z = unlist(g$data[i, g$cols]),
radius = g$radius,
mirror = g$mirror,
flip.axes = g$flip.axes,
col = "gray"))
# Create a dataframe with x1 y1 x2 y2 - Computed from bounding box
boxes <- lapply(seq_along(glorg), function(i) {
x1 <- grid::convertWidth(grid::grobX(glorg[[i]], "west"), "native", TRUE)
x2 <- grid::convertWidth(grid::grobX(glorg[[i]], "east"), "native", TRUE)
y1 <- grid::convertHeight(grid::grobY(glorg[[i]], "south"), "native", TRUE)
y2 <- grid::convertHeight(grid::grobY(glorg[[i]], "north"), "native", TRUE)
# x1 <- grid::convertWidth(boxdim(glorg[[i]]$x, "min"), "native", TRUE)
# x2 <- grid::convertWidth(boxdim(glorg[[i]]$x, "max"), "native", TRUE)
# y1 <- grid::convertHeight(boxdim(glorg[[i]]$y, "min"), "native", TRUE)
# y2 <- grid::convertHeight(boxdim(glorg[[i]]$y, "max"), "native", TRUE)
c(
"x1" = x1 - box_padding_x + g$nudge_x,
"y1" = y1 - box_padding_y + g$nudge_y,
"x2" = x2 + box_padding_x + g$nudge_x,
"y2" = y2 + box_padding_y + g$nudge_y
)
})
if (repel.debug) {
# Bounding box grob
boxes2 <- data.frame(do.call(rbind, boxes))
# bboxg <- lapply(seq_along(boxes2$x1), function(i) {
# grid::polylineGrob(x = c(boxes2$x1[i], g$data$x[i], boxes2$x2[i], g$data$x[i], boxes2$x1[i]),
# y = c(g$data$y[i], boxes2$y1[i], g$data$y[i], boxes2$y2[i], g$data$y[i]),
# gp = gpar(col = "grey"))
# })
bboxg <- lapply(seq_along(boxes2$x1), function(i) {
grid::polylineGrob(x = c(boxes2$x1[i], boxes2$x1[i], boxes2$x2[i], boxes2$x2[i], boxes2$x1[i]),
y = c(boxes2$y1[i], boxes2$y2[i], boxes2$y2[i], boxes2$y1[i], boxes2$y1[i]),
gp = gpar(col = "gray"))
})
}
# Make the repulsion reproducible if desired.
if (is.null(g$seed) || !is.na(g$seed)) {
set.seed(g$seed)
}
# The points are represented by circles.
g$data$point.size[is.na(g$data$point.size)] <- 0
# Beware the magic numbers. I do not understand them.
# I just accept them as necessary to get the code to work.
p_width <- grid::convertWidth(unit(1, "npc"), "inch", TRUE)
p_height <- grid::convertHeight(unit(1, "npc"), "inch", TRUE)
p_ratio <- (p_width / p_height)
if (p_ratio > 1) {
p_ratio <- p_ratio ^ (1 / (1.15 * p_ratio))
}
point_size <- p_ratio * grid::convertWidth(
grid::unit(g$data$point.size, "lines"), "native", valueOnly = TRUE
) / 13
point_padding <- p_ratio * grid::convertWidth(
grid::unit(g$point.padding, "lines"), "native", valueOnly = TRUE
) / 13
# Repel overlapping bounding boxes away from each other.
repel <- repel_boxes2(
data_points = as.matrix(g$data[,c("x","y")]),
point_size = point_size,
point_padding_x = point_padding,
point_padding_y = point_padding,
boxes = do.call(rbind, boxes),
xlim = range(g$limits$x),
ylim = range(g$limits$y),
hjust = rep (0.5, nrow(g$data)),
vjust = rep (0.5, nrow(g$data)),
force_push = g$force * 1e-6,
force_pull = g$force_pull * 1e-2,
max_time = g$max.time,
max_iter = ifelse(is.infinite(g$max.iter), 1e9, g$max.iter),
max_overlaps = g$max.overlaps,
direction = g$direction,
verbose = g$verbose
)
if (any(repel$too_many_overlaps)) {
warning(sum(repel$too_many_overlaps, na.rm = TRUE),
' glyphs have too many overlaps.\nConsider increasing "max.overlaps"')
}
# if (all(repel$too_many_overlaps)) {
# grobs <- list()
# class(grobs) <- "gList"
# return(setChildren(x, grobs))
# }
# create segment grobs
segg <- lapply(seq_along(g$data$x), function(i) {
if (!repel$too_many_overlaps[i]) {
row <- g$data[i, , drop = FALSE]
grid::curveGrob(x1 = repel[i,]$x, y1 = repel[i,]$y, x2 = row$x, y2 = row$y,
default.units = "native",
curvature = row$segment.curvature,
angle = row$segment.angle,
ncp = row$segment.ncp,
shape = row$segment.shape,
square = row$segment.square,
squareShape = row$segment.squareShape,
inflect = row$segment.inflect,
debug = row$segment.debug,
gp = gpar(col = row$segment.colour,
lwd = row$segment.size * ggplot2::.pt,
lty = row$segment.linetype),
arrow = row$arrow)
} else {
grid::nullGrob()
}
})
}
gl <- lapply(seq_along(g$data$x),
function(i) dotglyphGrob(x = if (g$repel) {
repel$x[i]
} else {
g$data$x[i]
},
y = if (g$repel) {
repel$y[i]
} else {
g$data$y[i]
},
z = unlist(g$data[i, g$cols]),
radius = g$radius,
mirror = g$mirror,
flip.axes = g$flip.axes,
fill = if (is.null(g$fill.dot)) {
if (!is.null(g$fill.gradient)) {
unlist(mapply(function(a, b) rep(a, b),
unlist(g$gdata[i, ]),
round(unlist(g$data[i, g$cols]))))
} else {
g$data$fill[i]
}
} else {
unlist(mapply(function(a, b) rep(a, b),
g$fill.dot,
round(unlist(g$data[i, g$cols]))))
},
col = g$data$colour[i],
lwd = g$data$linewidth[i],
alpha = g$data$alpha[i]))
if (g$repel) {
gl <- lapply(gl, grobTree)
if (repel.debug) {
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], glorg[[i]]))
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], bboxg[[i]]))
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], segg[[i]]))
# reorder grobs
gl <- lapply(seq_along(gl),
function(i) grid::reorderGrob(gl[[i]], c(2:4, 1:3)))
} else {
gl <- lapply(seq_along(gl), function(i) grid::addGrob(gl[[i]], segg[[i]]))
# reorder grobs
gl <- lapply(seq_along(gl),
function(i) grid::reorderGrob(gl[[i]], c(2, 1)))
}
}
gl <- do.call(grid::gList, gl)
grid::setChildren(g, gl)
}
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