[BioC] subset in XPS

[Zhibin Lu]

Hi,

I am new in R/bioconductor. I am using xps package to analyze Affymetrix Gene ST 1.0 data. After I loaded CEL files into the DataTreeSet and compute the expression level with RMA, can I work on a subset of the data? Say, I have 12 samples. After RMA, can I just work on 6 of them and divide them into two groups and apply UniFilter to just these 6 ones?

Thanks,

Zhibin