Rohit, I would try ?prcomp or ?princomp from the stats package.
Hope it works for you,
Cristobal

2010/4/14 Rohit Farmer <rohit.farmer@gmail.com>

> Hello everyone ...
>
> I am using affymetrix data and want to do PCA using bioconductor ...
> is there any package or library available which i can use to perform
> the same ...
>
> Thanks
>
> Rohit
>
> --
> Rohit Farmer
> M.Tech Bioinformatics
> Department of Computational Biology and Bioinformatics
> Jacob School of Biengineering and Biotechnology
> Sam Higginbottom Institute of Agriculture, Technology and Sciences
> (Formerly known as Allahabad Agricultural Institute - Deemed University)
> Allahabad, UP, INDIA - 211 007
> Ph. No. 9839845093, 9415261403
> e-Mail rohit.farmer@gmail.com
> Blog http://rohitsspace.blogspot.com
>
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