Please look at the output of script below. "3" is common between the 2 files but comm doesn't output that with -12 option. A prompt reply will be greatly appreciated. Thanks -sridhar > cat tmp1 1 3 > cat tmp2 2 3 > comm -12 tmp1 tmp2 > comm -13 tmp1 tmp2 2 3 > comm -23 tmp1 tmp2 1 3 > _____
Sridhar Hannenhalli Asst. Professor Penn Center for Bioinformatics Dept. of Genetics University of Pennsylvania (215) 746 8683 _______________________________________________ Bug-textutils mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-textutils