[R] how to delete the null elements in list

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

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

Re: [R] how to delete the null elements in list

Tammy Ma metal_licaling at live.com writes: 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

Re: [R] how to delete the null elements in list

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,