These are included here because pals depends on a number of compiled packages, and this can lead to increases in run time for Travis, and generally should be avoided when possible.
Number of colours to be generated.
Options are "alphabet", "alphabet2", "glasbey", "polychrome", and "stepped". Can be omitted and the function will use the one based on the requested n.
These palettes are a much better default for data with many classes than the default ggplot2 palette.
Many thanks to Kevin Wright for writing the pals package.
Taken from the pals package (Licence: GPL-3). https://cran.r-project.org/package=pals Credit: Kevin Wright
A vector of colors
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