l = list(c(1,2), c(3,5,6), c(7)) sapply(l, `[`, 1)
On Mon, Jul 21, 2014 at 3:55 PM, carol white <wht_...@yahoo.com> wrote: > Hi, > If we have a list of vectors of different lengths, how is it possible to > retrieve the first element of the vectors of the list? > > > l = list(c(1,2), c(3,5,6), c(7)) > > 1,3,7 should be retrieved > > Thanks > > Carol > [[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. ______________________________________________ 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.
