Hello all, Sorry for the dumb question... Is there a way to edit matrices, like delete a row and add a few new ones, without retyping the whole thing? Thanks, cathy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Catherine M. Stein Research Assistant, Tuberculosis Research Unit Doctoral Candidate in Genetic Epidemiology Department of Epidemiology and Biostatistics Case Western Reserve University office: (216)368-0875 or (216)778-1378 e-mail: kasia at darwin.cwru.edu, or cmstein at cwru.edu http://darwin.cwru.edu/~kasia EPBI Student Resources Page: http://hal.epbi.cwru.edu/stures/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~