Hi all, Assume I have a matrix xv= [1 0 0 0 0 12, 0 1 0 0 0 10, * 0 0 1 0 0 -9,* 0 0 0 1 0 20, * 0 0 0 0 1 -5]*
if the last column of "xv" less than 0 then I want to set zero the entire row. The desired output looks like the following. In this case row 3 and row 5 are set zero. [ 1 0 0 0 0 12, 0 1 0 0 0 10, * 0 0 0 0 0 0,* 0 0 0 1 0 20, * 0 0 0 0 0 0*] I used ifelse command but did not work Is there another command to do that? Thanks in advance \ [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.