On Sun, Feb 20, 2011 at 12:43 PM, Robert Baer <rb...@atsu.edu> wrote: >> You might try >> >> do.call(rbind, lapply(yourlist, "[", 1:4)) > > Thanks, Jorge, but when I tried this I simply got a matrix of character > strings rather than my original list of character strings as in: >> >> m = do.call(rbind, lapply(ls, "[", 1:4)) >> m > > [,1] [,2] [,3] [,4] > [1,] "Focused" "10k" "A12" "t04.tif" > [2,] "Focused" "10k" "A12" "t08.tif" > [3,] "Focused" "10k" "A12" "t12.tif" > [4,] "Focused" "10k" "A12" "t16.tif" > [5,] "Focused" "10k" "A12" "t20.tif" > [6,] "Focused" "10k" "A12" "t24.tif" > [7,] "Focused" "10k" "A12" "t36.tif" > [8,] "Focused" "10k" "A12" "t48.tif" > [9,] "Focused" "10k" "B12" "t04.tif" > [10,] "Focused" "10k" "B12" "t08.tif" >> > What I want to end up with is a vector that is the row-wise concatenation of > the strings in each row of your matrix or each element of my original list.
Try this: sapply(ls, function(x) paste(x[1:4], collapse = "")) or this: sapply(unname(as.data.frame(ls))[1:4,], paste, collapse = "") If you don't mind ugly names on the result the last one can be shortened to: sapply(as.data.frame(ls)[1:4,], paste, collapse = "") -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ 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.
