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Hi, I am new to R. I have a matrix that I have assigned to the object ?colon?. > colon<-read.table("c:\\alon.txt",header=T,row.names=1) attach(colon) names(colon) The dimenstions are 2000 62. Each of the 62 columns (titled norm1, norm2, norm3, etc) has 2000 different numbers (?continuous? values) within it. I have also assigned a name for each of the 2000 rows of the

Hi, I am relatively new to R and Bioconductor and am trying to filter the topTable that I generated of differentially expressed genes from my normlized eset file comprised of ~ 40 HG-133A Affy microarrays . I would like to see if particular probesets are represented in this list. Alternatively I would like to generate a topTable of differentially expressed genes using only specified probesets

Hi, I am new to R. I am trying to figure out how to graph expression data from the TCGA database. If I understand correctly the expression data I have downloaded is from a microarray using the AgilentG4502A. I've had trouble reading into R in the level I, level II, and the gene expression analysis data using >dat<-read.table("C:\\file.txt", header=T, row.names=1) for