HI, You could try: limma package: normalizeWithinArrays() A.K.
----- Original Message ----- From: David Lyon <david_ly...@yahoo.com> To: "r-help@r-project.org" <r-help@r-project.org> Cc: Sent: Thursday, August 23, 2012 8:37 AM Subject: [R] Please help....normalization by the median of some control genes Can someone show me some code to do normalization by the median of some control genes for the example below? Many Many Thanks in advance This strategy selects a subset of genes (called “control genes”) and makes the median of their data distribution similar across arrays. id1 id2 id3 control1 0.8 0.7 0.6 control2 0.6 0.2 0.4 probe1 0.3 0.2 0.5 probe2 0.4 0.9 0.7 probe3 0.6 0.7 0.4 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
