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2010 Feb 04
0
pca in R: Problem Fixed
...y 2010 14:07, S Ellison <S.Ellison@lgc.co.uk> wrote:
> I doubt you will get a useful answer as to why you cannot reporduce an
> example from a book - especially one you didn't cite!
>
> R has prcomp and princomp in the base package, and as others have
> pointed out, pca is implementd in other packages. We used ade4 a lot; it
> has quite nice default graphics.
>
> If you want to calculate principal components manually, you probably
> need to look at eigen() and remember a) in PCA, the vectors are usually
> given in order of decreasing eigenvalue and b) eigenvector...