Hello,

I'm also new to this, but I maybe I can help you.

This is a good lab that explains that in detail:

http://www.bioconductor.org/help/course-materials/2006/biocintro_april/thurs/affy/Affy.pdf

But basically I think you should try the "affy" package and the respective
vignette (which is a king of hands on manual).

> biocLite("affy")
> library(affy)
> openVignette()

Should help you. Or else just try the direct link to the vignette:

http://www.bioconductor.org/packages/2.7/bioc/vignettes/affy/inst/doc/affy.pdf

I hope I helped.

Cheers
On Wed, Feb 23, 2011 at 5:53 PM, Brian Tsai <btsai00@gmail.com> wrote:

> Hi all,
>
> I'm new to using R, and have been trying to figure out how to take some CEL
> files from an Affy U133A chip, RMA them, and combine probesets into entrez
> IDs.  I've tried searching the bioconductor help lists but can't find an
> appropriate thread, though I'm sure this has been addressed many times, and
> couldn't find a proper "workflow" either.
>
> Any help is much appreciated!
>
> Brian.
>
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-- 
João Moura

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