On 5/16/05, Luke <[EMAIL PROTECTED]> wrote: > I have a simple question, but I couldn't find the answer in R manuals. > > Assume I have a list: > > foo <- list() > > foo[[1]] <- c(1, 2, 3) > > foo[[2]] <- c(11,22,33) > > foo[[3]] <- c(111,222,333) > > foo > [[1]] > [1] 1 2 3 > > [[2]] > [1] 11 22 33 > > [[3]] > [1] 111 222 333 > > How to use list index to get a vector of, say, the first elements of > list elements? > That is, how to get a vector c(1, 11, 111) from foo? > > foo[[]][1] doesn't work. >
Try this: sapply(foo, "[", 1) ______________________________________________ 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
