Install using devtools::install_github("cjtexas/colourgen")
The colourgen package provides a single, simple interface for
generating colour palettes in R. colourgen::make_palette is the main
function and returns a colourgen object with very handy plot and
print methods to make generating, inspecting and fine-tuning color
palettes a breeze.
The colour parameter will accept any base R color function,
RColorBrewer named palette, viridis named palette,
color-hex palette ID or
variable-length character vector of any combination of base
grDevices::colours and/or hexadecimal colors.
At the time I created this package there weren’t enough good diverging
palettes and I tend to use them alot in my work, so colourgen will
default to some right out-of-the box.
colourgen::make_palette()
## Empty or Unknown Colour(s)...
## Defaulting to Tableau-style
## Orange-Blue Diverging Palette
my_palette <- colourgen::make_palette(default = FALSE)## Empty or Unknown Colour(s)...
## Defaulting to Stephen Few-style
## Earth-Emerald Diverging Palette
plot(my_palette)
If you like tweaking your color palettes, you can easily do that. Let’s
just simply replace the middle color with “ivory” and call
colourgen::make_palette again to check the new results.
my_palette[4] <- "ivory"
my_palette_mod <- colourgen::make_palette(colour = my_palette)
plot(my_palette_mod)
If you want to interpolate a palette that normally has a hard limit;
don’t worry, colourgen was created for this very reason and wil return
as many colors as you need for your factor levels! NOTE:, you should
still be careful and use common sense ;)
colourgen::make_palette(colour = "set1", n = 15)
colourgen also supports the
color-hex palette API. Just
supply a valid paletteID and you can interpolate over that palette ’til
your heart’s content.
colourgen::make_palette(colour = 1010612, n = 7)
colourgen will also accept an image path or url. For example, let’s
make a palette from the R logo!
colourgen::make_palette(colour = "http://r-project.org/Rlogo.png", n = 7)
colourgen will let you shuffle or reverse the returned palette if you
need to.
colourgen::make_palette(colour = "set3", n = 9, shuffle = TRUE)
colourgen::make_palette(colour = "Purples", n = 15, reverse = TRUE)
colourgen aims to be a simple, but effective solution to the common
task of crafting and previewing color palettes from many diverse
sources. I hope you find it useful and also feel free to make pull/merge
requests for bugs and improvements or adding new features if you like.