[R] PCA Using prcomp()

[S Ellison]

> -----Original Message-----
> christopher stratton
> Sent: 14 August 2011 22:22
> Subject: [R] PCA Using prcomp()
>
>  From the results 
> generated by prcomp(), is there a way to print a matrix 
> showing the contributions of the original variables to each 
> PC? 

Sounds like you're looking for the variable loadings matrix, stored in the prcomp object as 'rotation' according to the help page.

Extending the example from the help page:

usar.pca <-      prcomp(USArrests, scale = TRUE)
 
usar.pca$rotation

S Ellison
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