[R] biplots for PCA

Kevin Wright
2011-05-13T15:34:49Z

Did you try tweaking the value of the "expand" parameter?

See the help page of biplot for more info.

Kevin


On Fri, May 13, 2011 at 4:38 AM, Anna Renwick <anna.renwick@bto.org>
wrote:

> 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
>
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