Dear Sir/Madam: Glad to writing to you. I'm trying to use limma to analyse my microarray data. now I can get the "MA.txt"file which contains all of the ratios and intensities. but I want to get those genes that differentially expressed, ie. the log ratio is <-1 or >1. Could you write a command to write those genes to a seperate file. thanks, and waiting for your reply. your sincerely Gang Wei

You might want to read 'An Introduction to R', which outlines simple manipulations such as this. http://cran.r-project.org/doc/manuals/R-intro.pdf Best, Jim James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623 >>> "?? ?? ????-? ?*?? " <weig@genomics.org.cn> 08/07/04 08:56AM >>> Dear Sir/Madam: Glad to writing to you. I'm trying to use limma to analyse my microarray data. now I can get the "MA.txt"file which contains all of the ratios and intensities. but I want to get those genes that differentially expressed, ie. the log ratio is <-1 or >1. Could you write a command to write those genes to a seperate file. thanks, and waiting for your reply. your sincerely Gang Wei _______________________________________________ Bioconductor mailing list Bioconductor@stat.math.ethz.ch https://www.stat.math.ethz.ch/mailman/listinfo/bioconductor