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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 classes, I also tried rainbow() but its not appealing for sequential data. Thanks
719
In R, colors can be specified either by name (e.g col = “red”) or as a hexadecimal RGB triplet (such as col = “#FFCC00”). You can also use other color systems such as ones taken from the RColorBrewer package.
viridis , and its companion package viridisLite provide a series of color maps that are designed to improve graph readability for readers with common forms of color blindness and/or color vision deficiency.
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)
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