[R] color for points

From: Sam R. Smith <samrobertsmith_at_yahoo.com>
Date: Sat 08 Oct 2005 - 19:22:15 EST


Hi,
I have the following code to
randomly generate the
points:
csr <-function(n=60){

x=runif(n)
y=runif(n)
f=cbind(x,y)

}
plot(csr())  

I wonder how to code to make the first twenty points to be BLUE; second twenty points to be RED; the last twenty points to be GREEN?  

Thanks,
Sam                   


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