On Sun, Apr 20, 2008 at 08:16:11PM +0000, David Winsemius wrote: > Gabor Csardi <[EMAIL PROTECTED]> wrote in > news:[EMAIL PROTECTED]: > > > Hmm, my understanding is different, > > > > m <- matrix(sample(10*10), ncol=10) > > m2 <- rbind( m[1:5,], 1:10, m[6:10,] ) > > m3 <- cbind( m[,1:8], 1:10, m[,9:10] ) > > I read the question the same way and, in response to the part of the > question asking for no temporary matrix, offer this refinement on your > suggestion: > > m <- rbind( m[1:5,], 1:10, m[6:10,] ) # row insertion or ... > > # not to be followed by, but rather instead column insertion .. > m <- cbind( m[,1:8], 1:10, m[,9:10] )
There might be something wrong with my eyes, but where is the refinement here? Your lines are literally the same as mines. There is no temporary matrix here, m2 and m3 are the results, he wanted either between row 5 and 6 _OR_ column 8 and 9. Oh, if you mean that we immediately put back the result into 'm', then 1) it does not really matter, R will create a temporary matrix internally anyway, 2) i assumed that the user can figure this out him/herself. G. > -- > David Winsemius > > > > > G. > > > > On Sun, Apr 20, 2008 at 10:21:47AM -0300, Henrique Dallazuanna > > wrote: > >> If I understand: > >> > > > >> m <- matrix(sample(10*10), ncol=10) > >> m[5:6, 8:9] <- 1:4 > >> > > > >> > > > >> > > > >> On 4/18/08, Ng Stanley <[EMAIL PROTECTED]> wrote: > >> > Hi, > >> > > >> > Is there any functions to insert a vector or matrix into an > >> > existing ma > > trix > >> > say between row 5 and 6 or column 8 and 9, without creating a > >> > temporary matrix ? > >> > > >> > Thanks > >> > Stanley > > ______________________________________________ > 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. -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ 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.
