R/538.R

In alarm-redist/ggredist: Scales, Geometries, and Extensions of 'ggplot2' for Election Mapping

#' FiveThirtyEight scales for `ggplot2`
#'
#' @rdname scale_538
#'
#' @param ... additional arguments to `ggplot::scale_*` functions
#'
#' @return ggplot scale function
#'
#' @examples
#' library(ggplot2)
#' data(oregon)
#'
#' ggplot(oregon, aes(fill = ndv / (ndv + nrv))) +
#'     geom_sf(size = 0) +
#'     scale_fill_538(name = '') +
#'     theme_map()
#' @concept colors
#' @export
scale_fill_538 <- function(...) {
  ggplot2::binned_scale('fill', '538',
                        palette = function(x) ggredist$fivethirtyeight,
                        breaks = c(0, 0.35, 0.45, 0.55, 0.65, 1),
                        limits = c(.25, .75),
                        oob = scales::squish,
                        guide = 'colourbar',
                        ...
  )
}

#' @rdname scale_538
#' @concept colors
#' @export
scale_color_538 <- function(...) {
  ggplot2::binned_scale('color', '538',
                        palette = function(x) ggredist$fivethirtyeight,
                        breaks = c(0, 0.35, 0.45, 0.55, 0.65, 1),
                        limits = c(.25, .75),
                        oob = scales::squish,
                        guide = 'colourbar',
                        ...
  )
}