Try this: m <- matrix(0, nrow = 5, ncol = 4) diag(m) <- x[1] diag(m[-1,]) <- x[2]
On Sat, Jul 4, 2009 at 12:17 PM, William Simpson < william.a.simp...@gmail.com> wrote: > Can anybody please tell me a good way to do the following? > > Given a vector, number of rows and number of columns, return a matrix > as follows. Easiest to give an example: > > x=c(1,2), nrow=5, ncol=4 > > return the matrix: > > 1 0 0 0 > 2 1 0 0 > 0 2 1 0 > 0 0 2 1 > 0 0 0 2 > > Thanks very much for any help! > Bill > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[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.
