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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#' Evenly spaced colours for discrete data
#'
#' This is the default colour scale for categorical variables. It maps each
#' level to an evenly spaced hue on the colour wheel. It does not generate
#' colour-blind safe palettes.
#'
#' @param na.value Colour to use for missing values
#' @param aesthetics Character string or vector of character strings listing the
#' name(s) of the aesthetic(s) that this scale works with. This can be useful, for
#' example, to apply colour settings to the `colour` and `fill` aesthetics at the
#' same time, via `aesthetics = c("colour", "fill")`.
#' @param h,c,l,h.start,direction,... See \code{ggplot2::scale_colour_hue}
#' @examples
#' if (require("ggplot2")) {
#' df <- data.frame(level = c("a", "b", "c", "d"),
#' outcome = c(2.3, 1.9, 3.2, 1))
#' gg <- ggplot(df) +
#' geom_col_pattern(
#' aes(level, outcome, pattern_fill = level),
#' pattern = 'stripe',
#' fill = 'white',
#' colour = 'black'
#' ) +
#' theme_bw(18) +
#' scale_pattern_fill_hue()
#' plot(gg)
#' }
#' @return A [ggplot2::Scale] object.
#' @export
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
scale_pattern_colour_hue <- function(..., h = c(0, 360) + 15, c = 100, l = 65, h.start = 0,
direction = 1, na.value = "grey50", aesthetics = "pattern_colour") {
discrete_scale(aesthetics,
palette = hue_pal(h, c, l, h.start, direction),
na.value = na.value,
...)
}
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#' @rdname scale_pattern_colour_hue
#' @export
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
scale_pattern_fill_hue <- function(..., h = c(0, 360) + 15, c = 100, l = 65, h.start = 0,
direction = 1, na.value = "grey50", aesthetics = "pattern_fill") {
discrete_scale(aesthetics,
palette = hue_pal(h, c, l, h.start, direction),
na.value = na.value,
...)
}
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#' @rdname scale_pattern_colour_hue
#' @export
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
scale_pattern_fill2_hue <- function(..., h = c(0, 360) + 15, c = 100, l = 65, h.start = 0,
direction = 1, na.value = "grey50", aesthetics = "pattern_fill2") {
discrete_scale(aesthetics,
palette = hue_pal(h, c, l, h.start, direction),
na.value = na.value,
...)
}
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