[R] ggplot-How to define fill colours?

From: Pedro de Barros <pbarros_at_ualg.pt>
Date: Mon, 17 Dec 2007 22:54:47 +0000

Dear R's (most likely Hadley),

I want to build a stacked bar plot where I would like to define which colours will be used for each of the groups. However, I do not seem to find a way to do this, even if I've been looking over many places.

I have tried several variations, and my final try was this code, but I still do not manage to get the colours as I pre-define. Any hints about how to get this?

Thanks in advance,

my code:
>plotdata1<-data.frame(x=rep(factor(1:4),4), y=rep(0.1*(1:4),4),
+group=as.character(rep(c('white', 'red', 'blue', 'green'),rep(4,4))))
>plot3<-plot0+layer(data=plotdata1, mapping=aes_string(x='x',y='y',

+fill='group'),geom='bar', stat='identity', position='stack')

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