Or, suu[unlist(lapply(suu,length)!=0)] #[[1]] #[1] 1 2 #[[2]] # [,1] [,2] #[1,] 1 3 #[2,] 2 4 A.K.
----- Original Message ----- From: Rui Barradas <ruipbarra...@sapo.pt> To: Tammy Ma <metal_lical...@live.com> Cc: "r-help@r-project.org" <r-help@r-project.org> Sent: Friday, January 25, 2013 8:15 AM Subject: Re: [R] how to delete the null elements in list Hello, Try the following. suu <- list(NULL, NULL, 1:2, matrix(1:4, 2)) suu[!sapply(suu, is.null)] Hope this helps, Rui Barradas Em 25-01-2013 12:31, Tammy Ma escreveu: > > HI, > > I have the list: > > >> suu > [[1]] > NULL > > [[2]] > NULL > > [[3]] > item_id prod > 1 2 > > [[4]] > > item_id prod > 1 2 > 2 4 > > > > how to delete all "NULL" elements from suu to get only > >> suu > > [[3]] > item_id prod > 1 2 > > [[4]] > > item_id prod > 1 2 > 2 4 > > > ?? > > > Kind regards, > Tammy > > > [[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. ______________________________________________ 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.