Dear Josep,

Does it do the work for you?

# Example data
set.seed(123)
mydata=data.frame(c1=rnorm(100),c2=rnorm(100),cluster=sample(1:10,100,replace=TRUE))
attach(mydata)

# Plot
plot(c1,c2,col=cluster,pch=16,xlab="Your legend here",ylab="Your legend
here")

HTH,

Jorge


On Mon, Jul 7, 2008 at 1:51 PM, Josep Maria Campanera Alsina <
campaxic@gmail.com> wrote:

> R experts,
>
> I have three columns. c1 and c2 are numeric variables whereas c3 are the
> clusters classes (nominal variable, 10 different: cluster1, cluster2,
> cluster3, cluster4, cluster5 ....). I'd like to plot c1 against c2 (easy!)
> in a 2D plot and put different color depending to the cluster class
> automatically regardless the number of clusters.
>
> Could anyone give a hand?
>
> Josep Maria,
>
>
> matrix <- read.table(fileName, header=TRUE, sep=",")
> c1<-matrix[,1]
> c2<-matrix[,2]
> c3<-matrix[,3]
> plot(c1,c2) ????? what else?
>
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>
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