[R] how do i plot this "hist"?

[Jim Lemon]

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