Tena koe Kaspar ?outer
outer(b, a) or b %o% a HTH .... Peter Alspach > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Kaspar Bernet > Sent: Thursday, 18 March 2010 7:03 a.m. > To: r-help@r-project.org > Subject: [R] Vector multiplication > > Hi, > > this may sound stupid (and it probably is), but I can't seem to find > out how to multiply each element of a vector with each element of > another vector where the result would be a matrix of > dim[length(vectorOne),length(vectorTwo)] without using loops. > > example: if > > a -> c(1,2,3) > b -> c(4,5,6) > > i'm looking for the operation that would yield: > > [,1] [,2] [,3] > [1,] 4 8 12 > [2,] 5 10 15 > [3,] 6 12 18 > > any hints are greatly appreciated, > kaspar > > --------------------------------------------- > kaspar bernet kber...@student.ethz.ch > stationsstrasse 32 8442 hettlingen > tel 052 301 12 33 mobil 079 789 75 61 > > ______________________________________________ > 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. ______________________________________________ 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.
