see the row.w argument of the function dudi.pca in the ade4 package.
Cheers.
Alan Cohen wrote:> Hello R-ers,
>
> I'm trying to do a weighted principal components analysis. I
couldn't find any such option with princomp or prcomp. Does anyone know of
a package or way to do this?
>
> More specifically, the observations I'm working with are averages from
populations of varying sizes. I thus need to weight the observations by sample
size. Ideally I could apply these weights at the cell level (i.e., allowing
sample size to vary within observations across variables), but even applying
them just to the observations would get me most of the way there.
>
> I'm using R v2.8.1 on Windows XP. I've searched Help and the R
site and had no luck. Thanks for any help you can provide.
>
> Cheers,
> Alan Cohen
> Centre for Global Health Research
> Toronto, Ontario
>
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
>
--
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