[BioC] affy package: accessing the mas5 scale factors

Fenglong Liu fliu at jimmy.harvard.edu
Tue May 15 19:14:52 CEST 2007

I am using the bioconductor affy package to process a large number of 
CEL files to generate mas5 signal, mas5 PMA calls and rma signal, but I 
could not figure out a way to retrieve the scale factor values (sc=500, 
as a qc measure). I know in simpleaffy these values can be retrieved 
from sfs field; are the scale factor values accessible from affy 
package? from what field? Thanks / FL

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