How do I generate a mapping from numbers to colors in R?

Question

In R, I can easily generate a color ramp, for example colorRampPalette. The following produces a sequence of five colors, from blue to red:

> mypal <- colo         


        

Answer 1

My colourscheme package on R-Forge does that:

https://r-forge.r-project.org/projects/colourscheme/

its primary purpose is to create functions that map numeric values (not just integer colour numbers) to colours. The vignette is the best documentation once you've got it installed.