Hi casperyc,
While Jim Holtman's solution is quite neat, I thought I would add a
multiple histogram to the discussion in case that was what you wanted:
library(plotrix)
barp(t(x.m[,2:5]),names.arg=x.m[,1],col=rainbow(4))
legend(20,2500,paste("V",2:5,sep=""),fill=rainbow(4))
Jim
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