[BioC] Using genefilter

[Nathan.Watson-Haigh at csiro.au]

I've managed to use genefilter to generate an array of FALSE and TRUE's
for the affy bovine array I'm working with:
 
-- start code --
# expSet.RNA.RMAqndata is an ExpressionSet object with log2 expression
values
 
f1<-anyNA
f2<-kOverA(16, log2(100))   # filter out genes with low/no expression
over all arrays
ff<-filterfun(f1,f2)
wh<-genefilter(expSet.RNA.RMAqndata, ff)
sum(wh)      # number of genes passing the filter
-- end code --
 
I was wondering if someone could shed light on how to use the wh array
downstream with things such as limma etc.
 
Thanks
Nathan
 
 
-------------------------------------------------------------
Dr. Nathan S. Watson-Haigh        (publish under Haigh, N.S.)
OCE Post Doctoral Fellow
CSIRO Livestock Industries
J M Rendel Laboratory 
Rockhampton
QLD 4701                              Tel: +61 (0)7 4923 8121
Australia                             Fax: +61 (0)7 4923 8222