Hm, Now that you mention it, I believe they are factors. They just appeared as 0 or 1 so I treated them as numbers.
Once I found out they were factors I tried using the as.numeric() but that makes it 1 or 2 as before. How do I actually make it keep the factor number? Thanks, Greg On Sep 20, 2010, at 10:28 PM, David Winsemius wrote: > > On Sep 20, 2010, at 10:12 PM, Gregory Ryslik wrote: > >> Hi, >> >> I have a list of 5 main elements where each main element has 247 atomic >> entries either 0 or 1. I need to get this into a 247x5 matrix so I do >> "do.call(cbind, mylist)". However, it renumbers 0 to a 1 and the 1 to a 2 >> so that my matrix is filled with 1's and 2's. >> > > If I had such a problem I would see if this were more effective: > > matrix(unlist(mylist), length(mylist[[1]]) ) > > (There is the column major order default of R matrices.) > >> I understand I can fix it in this case by doing a replace but I would like >> to avoid that step. Further, sometimes, my list entries will be from 0 to n. >> I don't want to have to always renumber all the possibilities. >> >> I'm not quite sure why this is going on because when I build the following: >> l <- list(c(1,2,3),c(1,2,3),c(1,2,3)) >> and execute do.call(cbind, l) it works just fine and there is no renumbering! > > I wouldn't have expected it either, but you only provided an example of what > did work. My attempt at reproducing your problem also failed: > > > ll <- list(a=c(1,0,1,1,0), b=c(0,1,0,0,1) ) > > do.call(cbind, ll) > a b > [1,] 1 0 > [2,] 0 1 > [3,] 1 0 > [4,] 1 0 > [5,] 0 1 > > I am wondering if you are dealing with factors and have not looked at your > "list" with str(). Haven't tried my method above to see what would happen in > tat instance. > > > >> >> Thanks, >> Greg >> [[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. > > David Winsemius, MD > West Hartford, CT > ______________________________________________ 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.