Hi
[email protected] napsal dne 10.02.2010 21:32:29: > try this: > > > x <- 1:5 > > x.list <- lapply(1:15, function(a) x) > > do.call(cbind, x.list) > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] > [,13] [,14] [,15] > [1,] 1 1 1 1 1 1 1 1 1 1 1 1 > 1 1 1 > [2,] 2 2 2 2 2 2 2 2 2 2 2 2 > 2 2 2 > [3,] 3 3 3 3 3 3 3 3 3 3 3 3 > 3 3 3 > [4,] 4 4 4 4 4 4 4 4 4 4 4 4 > 4 4 4 > [5,] 5 5 5 5 5 5 5 5 5 5 5 5 > 5 5 5 > > Another option is n=15 matrix(rep(x, each=n), nrow=length(x), ncol=n) Regards Petr > > > On Wed, Feb 10, 2010 at 3:27 PM, Xu Wang <[email protected]> wrote: > > > > Hi, > > > > I would like to be able to repeat a string within a command. I think there > > is an easy way but I can not figure out how. > > > > Here is an example. > > > > x<-1:15 > > I would like to turn this into the following matrix: > > xm<-cbind(x,x,x,x,x) > > > > But I would like to do so by having a command that repeats x within the > > cbind command. Does that make sense? I have tried various things mainly > > involving the commands "rep" and "paste" but cannot get it. > > > > cbind(rep('x',times=5)) > > > > I am guessing that this is not good programming etiquette? Something seems > > off about it. But still, I would like to know how to do it. > > > > I do understand that I can use a for loop to easily accomplish the desired > > output but am looking for a solution similar to the above syntax. > > > > Thank you for any ideas, > > > > Xu Wang > > -- > > View this message in context: http://n4.nabble.com/expand-the-inside-of- > command-with-rep-tp1476420p1476420.html > > Sent from the R help mailing list archive at Nabble.com. > > > > ______________________________________________ > > [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. > > > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem that you are trying to solve? > > ______________________________________________ > [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. ______________________________________________ [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.
