Hi all, I'm having trouble getting R to read in my aCGH log2.ratio data. I am using Win2K. I notice that the example files are tab-delimited with "\n" as newlines. These work fine when read by R as R is able to differentiate samples columns from Well_ID columns (aka Target). I'm creating my files from excel and saving as tab-delimited TXT, but R reads every column as a sample, including the Well_IDs. Can someone help? For the sample files, num.samples(ex.acgh) outputs 2 whereas with my dataset it outputs 3 Thanks for the help! Jason