[R] palettes for the color-blind

[baptiste auguie]

Hi,

Try the dichromat package (also dichromat_pal in the scales package).

HTH,

baptiste

On 3 November 2011 10:26, Max Kuhn <mxkuhn at gmail.com> wrote:
> Everyone,
>
> I'm working with scatter plots with different colored symbols (via
> lattice). I'm currently using these colors for points and lines:
>
> col1 <- c(rgb(1, 0, 0), rgb(0, 0, 1),
>         rgb(0, 1, 0),
>         rgb(0.55482458, 0.40350876, 0.04166666),
>         rgb(0, 0, 0))
> plot(seq(along = col1), pch = 16, col = col1, cex = 1.5)
>
> I'm also using these with transparency (alpha between .5-.8 depending
> on the number of points).
>
> I'd like to make sure that these colors are interpretable by the color
> bind. Doing a little looking around, this might be a good palette:
>
> col2 <- c(rgb(0,         0.4470588, 0.6980392),
>          rgb(0.8352941, 0.3686275, 0,       ),
>          rgb(0.8000000, 0.4745098, 0.6549020),
>          rgb(0.1686275, 0.6235294, 0.4705882),
>          rgb(0.9019608, 0.6235294, 0.0000000))
>
> plot(seq(along = col2), pch = 16, col = col2, cex = 1.5)
>
> but to be honest, I'd like to use something a little more vibrant.
>
> First, can anyone verify that these the colors in col2 are
> differentiable to someone who is color blind?
>
> Second, are there any other specific palettes that can be recommended?
> How do the RColorBrewer palettes rate in this respect?
>
> Thanks,
>
> Max
>
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