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Dear everyone, I am trying to do a Wilcoxon one-sided test on my gene expression data. These are the data i have in R: data.matrix (matrix, numeric) containing all gene expression data (42 rows=genes, 42 columns=tumors), no column header or row names data.cl (vector, numeric) consisting of 42 0's and 1's to indicate class 0 or class 1 for each column in data.matrix I want to do a

Dear all, Probably a very basic question but I need some help. I have a data frame (made by read.table from a text file) of microarray data, of which the first column is a factor and the rest of the columns are numeric. The factor column contains chromosome names, so values 1 through 22 plus X, Y and XY. The numeric columns contain positions or intensity measurements. What I need to do is

Dear all, I have been using R for Windows before but recently switched to Mac. Now I am confused about how to install local packages using R 2.1.1. on the Mac. I found the menu Packages and Data, and have used it succesfully to install CRAN and Bioconductor packages (all binaries) by selecting these repositories from the pull-down menu and clicking the Get List button. However there is one