threshold said the following on 11/3/2007 4:41 AM: > Hi, my problem belongs to the basic ones. I want to get cumulated sum over > the matrix columns by one command (if such exists). Ordinary R's cumsum(x) > when x is: > [,1] [,2] > [1,] 1 5 > [2,] 2 6 > [3,] 3 7 > [4,] 4 8 > > yields: 1 3 6 10 15 21 28 36 > I want: > [,1] [,2] > [1,] 1 5 > [2,] 3 11 > [3,] 6 18 > [4,] 10 26 > Is there any command to do so?? > > best, robert > > >
Try apply(x, 2, cumsum) HTH, --sundar ______________________________________________ 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.
