[BioC] marray or rma?

James MacDonald jmacdon at med.umich.edu
Sat Feb 21 14:53:23 MET 2004

The marray* packages are for spotted cDNA arrays, and rma, which is part
of the affy package is for Affymetrix oligonucleotide microarrays.
Either package can be used for calculating normalized expression values,
but only for a particular microarray type.


James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
>>> <gjam at daimi.au.dk> 02/21/04 3:14 AM >>>
I don't know the difference between the use of the 'marray' package and
the use
of the function 'rma'. I would like to calculate the expression from raw
and to normalize all the data afterward.
Thanks for your help,

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