A=matrix(0,nr=3,nc=4) A[sample(prod(dim(A)),1)]=1 >>>
From: "Barroso, Judit" <[email protected]> To:"[email protected]" <[email protected]> Date: 10/Nov/2010 11:12a Subject: [R] Change a value in a matrix randomly I have a matrix of ceros, for example: 0 0 0 0 0 0 0 0 0 0 0 0 And I would like that one of these values turn into 1, for example if one condition is got, but not in a concrete position if not randomly. Could you indicate me the code to can get it? Thanks in advance, Judit Barroso [[alternative HTML version deleted]] ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R ( http://www.r/ )-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] ______________________________________________ [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.
