[BioC] assigning intensity values

James MacDonald jmacdon at med.umich.edu
Wed Dec 29 00:42:30 CET 2004

No trick; just use the same pm() accessor function.

new.pm <- <some vector or matrix of numbers>
pm(affybatch.example)[index,] <- new.pm



James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
>>> Lana Schaffer <schaffer at scripps.edu> 12/28/04 6:11 PM >>>
I know that I can extract intensity values using the expression
PM <- pm(affybatch.example)[Index,];
Is there any trick to reassigning new intensity values to the
CEL file?
Thanks for your help,

Lana Schaffer
Research Specialist
The Scripps Research Institute
DNA Array Core Facility

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