miles_palette <- c(
"#cbcbcb",
"#83c7f5",
"#d59f87",
"#728eb7",
"#625fc7",
"#a5697b",
"#d27236",
"#a23852",
"#2c687e",
"#371836"
)
#' @title miles palette
#' @description miles palette
#' @inheritDotParams ggplot2::discrete_scale
#' @param n number of colors
#' @param type discrete or continuous
#' @param reverse reverse order, Default: FALSE
#' @rdname miles_pal
#' @examples
#' library(scales)
#' show_col(miles_pal()(10))
#' @export
#' @importFrom scales manual_pal
#' @importFrom glue glue
#' @importFrom grDevices colorRampPalette
miles_pal <- function(n, type = c("discrete", "continuous"),
reverse = FALSE){
miles <- miles_palette
if (reverse == TRUE) {
miles <- rev(miles)
}
if (missing(n)) {
n <- length(miles)
}
type <- match.arg(type)
if (type == "discrete" && n > length(miles)) {
stop(glue::glue("Palette does not have {n} colors, maximum is {length(miles)}!"))
}
miles <- switch(type,
continuous = grDevices::colorRampPalette(miles)(n),
discrete = miles[1:n])
miles <- scales::manual_pal(miles)
return(miles)
}
#' @title scale_color_miles
#' @rdname miles_pal
#' @export
#' @examples
#'
#' library(ggplot2)
#' ggplot(airquality, aes(x = Day, y = Temp,
#' group = as.factor(Month), color = as.factor(Month))) +
#' geom_point(size = 2.5) +
#' scale_color_miles()
#' @importFrom ggplot2 discrete_scale scale_color_gradientn
scale_color_miles <- function(n, type = "discrete",
reverse = FALSE, ...){
if (type == "discrete") {
ggplot2::discrete_scale("color", "miles",
miles_pal(n = n, type = type,
reverse = reverse), ...)
} else {
ggplot2::scale_color_gradientn(colors = miles_pal(n = n, type = type,
reverse = reverse)(256))
}
}
#' @title scale_colour_miles
#' @rdname miles_pal
#' @export
#' @examples
#'
#' ggplot(airquality, aes(x = Day, y = Temp,
#' group = as.factor(Month), color = as.factor(Month))) +
#' geom_point(size = 2.5) +
#' scale_colour_miles()
#' @importFrom ggplot2 discrete_scale scale_color_gradientn
scale_colour_miles <- scale_color_miles
#' @title scale_fill_miles
#' @rdname miles_pal
#' @export
#' @examples
#'
#' ggplot(mpg, aes(displ)) +
#' geom_histogram(aes(fill = class),
#' col = "black", size = 0.1) +
#' scale_fill_miles()
#' @importFrom ggplot2 discrete_scale scale_fill_gradientn
scale_fill_miles <- function(n, type = "discrete",
reverse = FALSE, ...){
if (type == "discrete") {
ggplot2::discrete_scale("fill", "miles",
miles_pal(n = n, type = type,
reverse = reverse), ...)
} else {
ggplot2::scale_fill_gradientn(colors = miles_pal(n = n, type = type,
reverse = reverse)(256))
}
}
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