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2012 Nov 08
3
Extracting columns
...s, totaling 10,000 columns: c1, c2, c3, ..., c10000 I have another file with a list of 100 columns that I need to extract. These 100 columns are distributed in 22 files. How to extract the 100 columns of the 22 files? I have done it "manually" with the following commands, for example: cromo1 = read.table ("~ / cromo1.raw ', head = T) c1 = subset (cromo1, select = c ('c1', 'c50', 'C750')) in this case, I know that the columns c1, c50 and C750 are on cromo1.raw. See who need to apply the commands above 22 times. Is there a way to schedule these operatio...