File generation process is not ongoing. I have a fixed number of files. Ultimately i'm trying to create two files, one with table consisting of only male data and the other female, with the format of what i described in earlier post. I am trying to compare male and female's expression level of each genes(which is column1 in the table i described) and see which genes have higher expression level in female. So my initial goal right now is to make a male file that consist of gene names(first column) and expression levels of each male (rest of the columns).