R help - Dec 2006 - Replacing labels with symbols in biplot

Dear all
I would like to replace labels for x in biplot() with symbols (points)
that will visually illustrate different classes/groups. After an
unsuccessful search through the documents and archives, I turn to the
list for help - any suggestions that can point me in the right
direction?
Thanks
Mat Vanderklift

Hi Mat,

You can more-or-less do what you want with the xlabs argument to
biplot. It only takes characters, rather than the normal plot symbol
codes, though. If you need symbols, you can "cheat" with things like
+ o x. I usually use letters for the different groups within the data:
> 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"))
>
Sarah

On 12/17/06, Mat.Vanderklift at csiro.au <Mat.Vanderklift at csiro.au>
wrote:
> Dear all
> I would like to replace labels for x in biplot() with symbols (points)
> that will visually illustrate different classes/groups.
-- 
Sarah Goslee
http://www.stringpage.com
http://www.functionaldiversity.org