Will something like this help? mm <- matrix(rnorm(100),nrow=10) mm nn <- mm >.5 nn
--- Lanre Okusanya <[EMAIL PROTECTED]> wrote: > Hello all, > > I am working with a 1000x1000 matrix, and I would > like to return a > 1000x1000 matrix that tells me which value in the > matrix is greater > than a theshold value (1 or 0 indicator). > i have tried > mat2<-as.matrix(as.numeric(mat1>0.25)) > but that returns a 1:100000 matrix. > I have also tried for loops, but they are grossly > inefficient. > > THanks for all your help in advance. > > Lanre > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > ______________________________________________ R-help@stat.math.ethz.ch 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.
