Hi all, I have a matrix with each column containing a large number of integers (0 and above). in each column beyond a certain row (say row 120 in column 1, row 134 in column 2, 142 in column 3...) there are only 0's. I want to find, for each column the row number of the last row which contains a positive integer beyond which there are 10 or more 0's.
so in the following example (single column, but my real data has multiple columns) how do I get the row number of the last row of x beyond which there are 10 or more 0's (which in this case is row#100). x <- as.matrix(c(rep(seq(1:20),5),rep(0,20))) I am still new to R so I was wondering if anyone had a quick fix. Thanks Kartik ______________________________________________ [email protected] 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.
