[BioC] Filter genes on mas5calls

[Anthony Bosco]

Hi all.

I would like to filter my Affymetrix data using the mas5calls 
function in Affy package.

For example, I would like to only look at genes which are called 
present at least twice in 20 chips, and remove genes which are always 
absent.

Not sure how to go about this.


Regards


Anthony
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______________________________________________

Anthony Bosco - Cell Biology Research Assistant

Institute for Child Health Research
(Company Limited by Guarantee ACN 009 278 755)
Subiaco, Western Australia, 6008

Ph 61 8 9489  , Fax 61 8 9489 7700
email anthonyb at ichr.uwa.edu.au