visualizeR/R/pal_fallback.R

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584 B
R

pal_fallback <- function(reverse = FALSE,
color_ramp_palette = FALSE,
discrete = FALSE,
n = 5,
...){
pal <- if(discrete) { viridisLite::viridis(n) } else {viridisLite::magma(n)}
if (reverse) pal <- rev(pal)
if (color_ramp_palette) {
rlang::check_installed("grDevices", reason = "Package \"grDevices\" needed for `pal_fallback()` with 'color_ramp_palette' set to `TRUE` to work. Please install it.")
pal <- grDevices::colorRampPalette(pal, ...)
}
return(pal)
}