Hello! I am running ubuntu, I have a copy of open office excel, but I need to edit a tab space delimited text file with my data in it so I can use gnuplot to plot it. The editing consists of subtracting one column of data from a file, from another column of data in another file. Each row corresponds to another row in another document... There are about 1000 rows so I cannot do this manually. My lab writeup is due in a few hours, this is the last step I need to complete for the analysis! I know there is a way to write a quick and dirty program that will perform the operation, but my experience with such things is limited to date. So please! Help!