Hello all,
I just started in on R today. I am at the point where I am trying
to distinguish different groups of data (hydrochemical data) in
biplot. I search and found a post about converting the sample number
in biplot to a symbol like x or +
"> temp <- matrix(runif(50), nrow=10)
> temp.pca <- princomp(temp)
> biplot(temp.pca, xlabs=c("A", "A", "B", "B", "B", "C", "C", "C",
"D", "D"))"
When I try this:
> biplot(pca,xlabs=c("X"))
Error in dimnames(x) <- list(xlabs, dimnames(x)[[2L]]) :
length of 'dimnames' [1] not equal to array extent
I guess I am not understanding fully what xlabs is doing and what the
array extent is. I was wondering if someone could clarify for me how
to change the sample numbers to a symbol?
Also is there a way to color a group of data (i.e. samples 1-50) in
biplot?
Thank you for your time and help,
ara
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