Hi all,

I have

1.       an affy object that contains all my normalized data, the result from rma.

2.       an affy object that contains P/M/A calls, the result from mas5calls.

I now want to eliminate probe sets from my normalized data that are absent in all my samples. I then want to set up a contrast matrix and fit a model using probesets that are only present in ALL samples.

Does anyone know how I can extract this subset of data from my object in 1?

Thanks!

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