Hi Steven, as.data.frame(sapply(a,"*",p))
Jim On Mon, May 23, 2016 at 8:22 AM, Steven Yen <sye...@gmail.com> wrote: > Dear R users: > > > # p is a vector if length 10 > > # a is a vector if length 3 > > # I like to create a matrix with > > # the first column being p multiplied by a[1] > > # the second column being p multiplied by a[2] > > # the third column being p multiplied by a[3] > > # The following would do that: > > > > a<-c(10,100,1000); a > [1] 10 100 1000 > > p<-matrix(1:10,nrow=10); p > [,1] > [1,] 1 > [2,] 2 > [3,] 3 > [4,] 4 > [5,] 5 > [6,] 6 > [7,] 7 > [8,] 8 > [9,] 9 > [10,] 10 > > cbind(a[1]*p,a[2]*p,a[3]*p) > [,1] [,2] [,3] > [1,] 10 100 1000 > [2,] 20 200 2000 > [3,] 30 300 3000 > [4,] 40 400 4000 > [5,] 50 500 5000 > [6,] 60 600 6000 > [7,] 70 700 7000 > [8,] 80 800 8000 > [9,] 90 900 9000 > [10,] 100 1000 10000 > > > > # Gauss does it easily with an element-by-element > > # multiplicationa.*p > > # How can I do this in R? > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
