Hi Rui, Thanks for your reply. Yes, when I tried to rbind two dataframes, it works. However, if there are more than 50, it got stuck for hours. When I tried to terminate the process and open the csv file separately, it has only one data frame. What is the problem? Thanks.
On Fri, Jan 6, 2017 at 11:12 AM, Rui Barradas <ruipbarra...@sapo.pt> wrote: > Hello, > > Works with me: > > set.seed(6574) > > pre.mat = data.frame() > for(i in 1:10){ > mat.temp = data.frame(x = rnorm(5), A = sample(LETTERS, 5, TRUE)) > pre.mat = rbind(pre.mat, mat.temp) > } > > nrow(pre.mat) # should be 50 > > > Can you give us an example that doesn't work? > > Rui Barradas > > > Em 06-01-2017 18:00, lily li escreveu: > >> Hi R users, >> >> I have a question about filling a dataframe in R using a for loop. >> >> I created an empty dataframe first and then filled it, using the code: >> pre.mat = data.frame() >> for(i in 1:10){ >> mat.temp = data.frame(some values filled in) >> pre.mat = rbind(pre.mat, mat.temp) >> } >> However, the resulted dataframe has not all the rows that I desired for. >> What is the problem and how to solve it? Thanks. >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posti >> ng-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >> [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.