Make square pie charts
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geom_rtile <- function(mapping = NULL, data = NULL,
stat = "identity", position = "identity",
radius = grid::unit(6, "pt"),
...,
na.rm = FALSE,
show.legend = NA,
inherit.aes = TRUE) {
ggplot2::layer(
data = data,
mapping = mapping,
stat = stat,
geom = GeomRtile,
position = position,
show.legend = show.legend,
inherit.aes = inherit.aes,
params = list(
radius = radius,
na.rm = na.rm,
...
)
)
}
GeomRtile <- ggplot2::ggproto("GeomRtile", GeomRrect,
extra_params = c("na.rm", "width", "height"),
setup_data = function(data, params) {
data$width <- data$width %||% params$width %||% ggplot2::resolution(data$x, FALSE)
data$height <- data$height %||% params$height %||% ggplot2::resolution(data$y, FALSE)
transform(data,
xmin = x - width / 2, xmax = x + width / 2, width = NULL,
ymin = y - height / 2, ymax = y + height / 2, height = NULL
)
},
default_aes = ggplot2::aes(
fill = "grey20", colour = NA, size = 0.1, linetype = 1, alpha = NA
),
required_aes = c("x", "y"),
draw_key = ggplot2::draw_key_polygon
)