On Sun, Mar 16, 2003 at 09:09:36AM +0900, Youichi Mano wrote: > I want to "uniq" by comparing the specified column for matrix data. > I want to realize this operation by command line programs , > not any script file. I must say, this arbitrary restriction kind of looks like a homework question to me ...? Cheers, -- Colin Watson [cjwatson@flatline.org.uk]