[BioC] how presence p-values can be accessed in mas5call output?

James W. MacDonald jmacdon at med.umich.edu
Tue Jun 12 21:09:01 CEST 2007

Hi Martin,

Martin Morgan wrote:
> Use
> instead. This uses the 'assayData' accessor to retrieve the assay
> data, and the '[[' subsetting function to select the 'se.exprs'
> element. Using the accessor provides some protection should the slot
> name change. Using '[[' provides some protection against assayData
> returning a 'list', which it is allowed to do.

Is this in lieu of an se.exprs() accessor? If so it might be worthwhile 
to add something to the ExpressionSet-class help page. I don't see 
anything there for the assayData() accessor itself, nor anything about 
how one might subset the output from this accessor safely.



> Martin

James W. MacDonald, M.S.
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109

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