biplots for PCA

Hi all

I have produced a biplot for a PCA (see attached pdf) that I ran however the
names of the variables which are placed at the end of the arrows overlap and
are thus unreadable. Similarly some of the numbered points overlap. I was
wondering if there was a way to edit the biplot to move the label names and
if not what the best alternative is.

Thanks
Anna

pca<-biodata[,3:10]
model<-prcomp(pca,scale=TRUE)
summary(model)
biplot(model)

Dr Anna R. Renwick
Research Ecologist
British Trust for Ornithology,
The Nunnery,
Thetford,
Norfolk,
IP24 2PU,
UK
Tel: +44 (0)1842 750050; Fax: +44 (0)1842 750030
-------------- next part --------------
A non-text attachment was scrubbed...
Name: PCA.pdf
Type: application/pdf
Size: 6580 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20110513/731e9fd4/attachment.pdf>