like this, the list is below, I want to remove the last one . not using newlist[-2], but using the function detect its component is numeric(0) and then remove it from the list. newlist [[1]] [1] 2 3 [[2]] [1] numeric(0) [[3]] [1] 7 [[alternative HTML version deleted]]
Bill.Venables at csiro.au
2010-Jun-29 04:42 UTC
[R] how to remove "numeric(0)" component from a list
newlist <- newlist[sapply(newlist, length) > 0] -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of song song Sent: Tuesday, 29 June 2010 2:12 PM To: r-help at r-project.org Subject: [R] how to remove "numeric(0)" component from a list like this, the list is below, I want to remove the last one . not using newlist[-2], but using the function detect its component is numeric(0) and then remove it from the list. newlist [[1]] [1] 2 3 [[2]] [1] numeric(0) [[3]] [1] 7 [[alternative HTML version deleted]] ______________________________________________ R-help at 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.
Charles C. Berry
2010-Jun-29 04:53 UTC
[R] how to remove "numeric(0)" component from a list
On Mon, 28 Jun 2010, song song wrote:> like this, the list is below, I want to remove the last one . not using > newlist[-2], but using the function detect its component is numeric(0) and > then remove it from the list.Filter( length, newlist ) see ?Filter HTH, Chuck> > newlist > > [[1]] > [1] 2 3 > > [[2]] > [1] numeric(0) > > [[3]] > [1] 7 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >Charles C. Berry (858) 534-2098 Dept of Family/Preventive Medicine E mailto:cberry at tajo.ucsd.edu UC San Diego http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901