[R] PCA and gglot2

[ashz]

Hi,

I was trying as well as looking for an answer without success (a bit strange
since it should be an easy problem) and therefore I will appreciate you
help:

My simple script is:
# Loadings data of 5 columns and 100 rows of data
data1<-read.csv("C:/…/MyPCA.csv")
pairs(data1[,1:4])
pca1 <- princomp(data1[,1:4], score=TRUE, cor=TRUE)
biplot(pca1)

The biplot present the data points as numbers. How can I present the data
point in color (depends on their group-column 5). I was thinking about doing
it using ggplot2 but I can not succeed. Any idea how to do it?

Thanks 



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