R color palettes for many data classes

Question

Are there any good packages for colour palettes in R that can handle many data classes? I have 16 sequential data classes. I tried RColorBrewer but it has a max of 9 data cl

Answer 1

After much experimentation, I came up with the 25 colors that are mostly distinguishable. This is intended for classed data, not continuous/sequential data.

c25 <- c(
  "dodgerblue2", "#E31A1C", # red
  "green4",
  "#6A3D9A", # purple
  "#FF7F00", # orange
  "black", "gold1",
  "skyblue2", "#FB9A99", # lt pink
  "palegreen2",
  "#CAB2D6", # lt purple
  "#FDBF6F", # lt orange
  "gray70", "khaki2",
  "maroon", "orchid1", "deeppink1", "blue1", "steelblue4",
  "darkturquoise", "green1", "yellow4", "yellow3",
  "darkorange4", "brown"
)
pie(rep(1, 25), col = c25)