---------- Forwarded message ---------- From: Carlos Petti <carlos.pe...@gmail.com> Date: 2010/8/10 Subject: Re: [R] List of lists ? To: David Winsemius <dwinsem...@comcast.net>
Thanks for answer. I read the error messages but I did not find the solution :-( Your solution works. But, a new problem remains because I want to use the list of lists as follows : x <- list(list()) x[[2]][[1]] <- c(1, 2, 3) x[[2]][[2]] <- c(3, 2, 1) Thanks in advance, Carlos 2010/8/9 David Winsemius <dwinsem...@comcast.net>: > > On Aug 9, 2010, at 12:57 PM, Carlos Petti wrote: > >> Dear list, >> >> I have to use a list of lists containing vectors. >> >> For instance : >> >> [[1]] >> [[1]][[1]] >> [1] 1 2 3 >> >> [[1]][[2]] >> [1] 3 2 1 >> >> I want to attribute vectors to the main list >> >> without use of an intermediate list, >> >> but it does not work : > > More specifically it produces an error that has information in it. >> x[[1]][[1]] <- c(1, 2, 3) > Error in `*tmp*`[[1]] : subscript out of bounds > >> >> x <- list() >> x[[1]][[1]] <- c(1, 2, 3) >> x[[1]][[2]] <- c(3, 2, 1) > > So thinking perhaps we just needed another level of subscripting "available" > I tried: > >> x <- list(list()) >> x[[1]][[1]] <- c(1, 2, 3) >> x[[1]][[2]] <- c(3, 2, 1) >> x > [[1]] > [[1]][[1]] > [1] 1 2 3 > > [[1]][[2]] > [1] 3 2 1 > > Success. Moral: Read the error messages for meaning or at least clues. > (Further testing showed that almost anything inside the original list() > call, even NULL, would have created enough structure for the interpreter to > work with. > >> > > 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.
