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#' @title Side function plot
#' @description
#' The [xside] and [yside] variants of \link[ggplot2]{geom_function}
#' @inheritParams ggplot2::geom_function
#' @param ylim Optionally, restrict the range of the function to this range (y-axis)
#' @aliases geom_*sidefunction
#' @return XLayer or YLayer object to be added to a ggplot object
#' @examples
#' x<- rweibull(100, 2.6, 3)
#' y<- rweibull(100, 1.8, 3)
#' xy.df<- data.frame(cbind(x,y))
#' p <- ggplot(xy.df, aes(x, y)) +
#' geom_point(colour = "blue", size = 0.25) +
#' geom_density2d() +
#' geom_xsidedensity(fill = "blue", alpha = .3) +
#' geom_ysidedensity(fill = "blue", alpha = .3) +
#' stat_xsidefunction(fun = dweibull, args = list(shape = 1.8, scale = 3), colour = "red") +
#' stat_ysidefunction(fun = dweibull, args = list(shape = 2.6, scale = 3), colour = "red") +
#' theme_classic()
#' p
#' @export
geom_xsidefunction <- function(mapping = NULL, data = NULL,
stat = "function", position = "identity",
...,
na.rm = FALSE,
show.legend = NA,
inherit.aes = TRUE) {
l <- layer(
data = data,
mapping = mapping,
stat = stat,
geom = GeomXsidefunction,
position = position,
show.legend = show.legend,
inherit.aes = inherit.aes,
params = list(
na.rm = na.rm,
...
),
layer_class = XLayer
)
structure(l, class = c("ggside_layer",class(l)))
}
#' @rdname geom_xsidefunction
#' @export
stat_xsidefunction <- function(mapping = NULL, data = NULL, geom = "xsidefunction", position = "identity",
..., fun, xlim = NULL, n = 101, args = list(), na.rm = FALSE,
show.legend = NA, inherit.aes = TRUE) {
l <- layer(data = data, mapping = mapping, stat = StatFunction,
geom = geom, position = position, show.legend = show.legend,
inherit.aes = inherit.aes, params = list(fun = fun, n = n,
args = args, na.rm = na.rm, xlim = xlim, ...),
layer_class = XLayer)
structure(l, class = c("ggside_layer", class(l)))
}
#' @rdname ggside-ggproto-geoms
#' @usage NULL
#' @format NULL
#' @export
GeomXsidefunction <- ggplot2::ggproto("GeomXsidefunction",
ggplot2::GeomFunction,
default_aes = new_default_aes(
aes(xcolour = NA, xfill = NA),
ggplot2::GeomFunction$default_aes
),
setup_data = function(data, params){
data <- parse_side_aes(data, params)
ggplot2::GeomPath$setup_data(data, params)
},
draw_panel = function(data, panel_params, coord, arrow = NULL,
lineend = "butt", linejoin = "round", linemitre = 10,
na.rm = FALSE){
data <- use_xside_aes(data)
ggplot2::GeomPath$draw_panel(data = data, panel_params, coord = coord, arrow = arrow,
lineend = lineend, linejoin = linejoin, linemitre = linemitre)
},
draw_key = function(data, params, size){
data <- use_xside_aes(data)
ggplot2::GeomPath$draw_key(data, params, size)
})
#' @rdname geom_xsidefunction
#' @export
geom_ysidefunction <- function(mapping = NULL, data = NULL,
stat = "ysidefunction", position = "identity",
...,
na.rm = FALSE,
show.legend = NA,
inherit.aes = TRUE) {
l <- layer(
data = data,
mapping = mapping,
stat = stat,
geom = GeomYsidefunction,
position = position,
show.legend = show.legend,
inherit.aes = inherit.aes,
params = list(
na.rm = na.rm,
...
),
layer_class = YLayer
)
structure(l, class = c("ggside_layer",class(l)))
}
#' @rdname geom_xsidefunction
#' @export
stat_ysidefunction <- function(mapping = NULL, data = NULL, geom = "ysidefunction", position = "identity",
..., fun, ylim = NULL, n = 101, args = list(), na.rm = FALSE,
show.legend = NA, inherit.aes = TRUE) {
l <- layer(data = data, mapping = mapping, stat = StatYsidefunction,
geom = geom, position = position, show.legend = show.legend,
inherit.aes = inherit.aes, params = list(fun = fun, n = n,
args = args, na.rm = na.rm, ylim = ylim, ...),
layer_class = YLayer)
structure(l, class = c("ggside_layer", class(l)))
}
#' @rdname ggside-ggproto-geoms
#' @usage NULL
#' @format NULL
#' @export
GeomYsidefunction <- ggplot2::ggproto("GeomYsidefunction",
ggplot2::GeomFunction,
default_aes = new_default_aes(
aes(ycolour = NA, yfill = NA),
ggplot2::GeomFunction$default_aes
),
setup_data = function(data, params){
data <- parse_side_aes(data, params)
ggplot2::GeomPath$setup_data(data, params)
},
draw_panel = function(data, panel_params, coord, arrow = NULL,
lineend = "butt", linejoin = "round", linemitre = 10,
na.rm = FALSE){
data <- use_yside_aes(data)
ggplot2::GeomPath$draw_panel(data = data, panel_params, coord = coord, arrow = arrow,
lineend = lineend, linejoin = linejoin, linemitre = linemitre)
},
draw_key = function(data, params, size){
data <- use_yside_aes(data)
ggplot2::GeomPath$draw_key(data, params, size)
})
StatYsidefunction <- ggplot2::ggproto("StatYsidefunction",
ggplot2::StatFunction,
compute_group = function (data, scales, fun, ylim = NULL, n = 101, args = list()) {
if (is.null(scales$y)) {
range <- ylim %||% c(0, 1)
yseq <- seq(range[1], range[2], length.out = n)
y_trans <- yseq
}
else {
range <- ylim %||% scales$y$dimension()
yseq <- seq(range[1], range[2], length.out = n)
if (scales$y$is_discrete()) {
y_trans <- yseq
}
else {
y_trans <- scales$y$trans$inverse(yseq)
}
}
if (is.formula(fun))
fun <- as_function(fun)
x_out <- do.call(fun, c(list(quote(y_trans)), args))
if (!is.null(scales$y) && !scales$y$is_discrete()) {
x_out <- scales$y$trans$transform(x_out)
}
new_data_frame(list(x = x_out, y = yseq))
})
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