[R] plotting other axes for PCA

From: Silvia Lomascolo <slomascolo_at_zoo.ufl.edu>
Date: Fri, 18 Jan 2008 08:46:30 -0800 (PST)

Hi R-community,
I am doing a PCA and I need plots for different combinations of axes (e.g., PC1 vs PC3, and PC2 vs PC3) with the arrows indicating the loadings of each variables. What I need is exactly what I get using biplot (pca.object) but for other axes.

I have plotted PC2 and 3 using the scores of the cases, but I don't get the arrows proportional to the loadings of each variables on each axis.

Any hints on this?

Thanks, Silvia.

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