Dear all,

I have a 2 by 2 matrix and I would like to do a barplot with it.  (so 2 bars with each having 2 stacks.).  I would like to have one colors per stack, so 4 different colors total.
The problem is that R is only given me 2 colors (the same two for the bottom stack and the same two for the top stack).  Any idea how I can do to have 4 colors? (without using ggplot2 preferably)
Here is my code

> w <- matrix(table(cutMF12G3),2,2)
> w
     [,1] [,2]
[1,]    8   13
[2,]    8    8

> barplot(w, main="2012", col=c("red", "green", "blue", "pink"))

Thanks in advance for your help.

François



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