[BioC] Renaming row names (U133A/B joining problem)

[Daniel Brewer]

Hi,

I have a expression dataset where I want to join Affymetrix U133A and B
arrays.  The rownames of the expression matrix are set to the probe
names.  To do this I want to treat all the probe names that are shared
between the arrays as unique by appending an "_A" or "_B".  I do this by
finding the names of the probe that are shared and then running:

rownames(expr.matrix[match(ProbeIntersect,rownames(expr.matrix)),]) <-
paste(rownames(expr.matrix[match(ProbeIntersect,rownames(expr.matrix)),]),"_A",sep="")

Where "expr.matrix" is the expression matrix and "ProbeIntersect" is the
list of probe names that are shared.  This command though does not seem
to change the row names.  Any idea what I am doing wrong?

Thanks

Daniel

-- 
**************************************************************

Daniel Brewer, Ph.D.
Institute of Cancer Research
Email: daniel.brewer at icr.ac.uk

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The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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