Function to return colour palettes functions from 'cpt-city'

Source: R/cpt.R

This function return a collor palette based on the name or position of the palette.

cpt(
  pal = "mpl_inferno",
  n = 100,
  colorRampPalette = FALSE,
  rev = FALSE,
  frgb = rep(1, 3)
)

Arguments

pal

Palette of colors available or the number of the position

n

integer; number of colors

colorRampPalette

Logical; to be used in sf and mapview.

rev

Logical; to internally revert order of rgb color vectors.

frgb

Numeric; vector of 3 to change internal rgb composition. The order is red, green, blue

Value

A colour palette function.

Details

The cpt-city web archive comes from: http://soliton.vm.bytemark.co.uk/pub/cpt-city/index.html

Examples

{
library(cptcity)
image(matrix(1:100), col = cpt(pal = "mpl_inferno"))
find_cpt("temperature")
image(matrix(1:100), col = cpt("idv_temperature"))
image(matrix(1:100), col = cpt("idv_temperature", rev = TRUE))
if (FALSE) {
# Do not run
library(ggplot2)
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density))

 ggplot(faithfuld, aes(waiting, eruptions)) +
 geom_raster(aes(fill = density)) +
 scale_fill_gradientn(colours = cpt(n = 100))
}
}