Maybe I am missing the point -- but what is wrong with line 3 of: m=rbind(c(6,4,2),c(3,2,1)) v= c(3,2,1) m%*%diag(1/v) # [,1] [,2] [,3] # [1,] 2 2 2 # [2,] 1 1 1
Ted. On 14-May-2014 15:03:36 Frede Aakmann Tøgersen wrote: > Have a look at ?sweep > > Br. Frede > > > Sendt fra Samsung mobil > -------- Oprindelig meddelelse -------- > Fra: carol white > Dato:14/05/2014 16.53 (GMT+01:00) > Til: r-h...@stat.math.ethz.ch > Emne: [R] matrix column division by vector > > Hi, > What is the elegant script to divide the columns of a matrix by the > respective position of a vector elements? > > m=rbind(c(6,4,2),c(3,2,1)) > > v= c(3,2,1) > > res= 6/3 4/2 2/1 > 3/3 2/2 1/1 > > > this is correct > mat2 = NULL > > for (i in 1: ncol(m)) > > mat2 = cbind(mat2, m[,i]/ v[i]) > > > but how to do more compact and elegant with for ex do.call? > > Many thanks > > Carol > [[alternative HTML version deleted]] > > > [[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. ------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@wlandres.net> Date: 14-May-2014 Time: 18:16:12 This message was sent by XFMail ______________________________________________ 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.
