on 02/12/2009 10:07 PM Stuart Jaffe wrote: > Hi, > I have a list of numbers (classified as a list) that contains integer(0) > empty vectors. How do I convert those integer(0) into NAs? Thanks
Presuming that you are referring to a list along the lines of: L <- list(1:5, integer(0), 2:4, integer(0), integer(0), 3:7) > L [[1]] [1] 1 2 3 4 5 [[2]] integer(0) [[3]] [1] 2 3 4 [[4]] integer(0) [[5]] integer(0) [[6]] [1] 3 4 5 6 7 You could use: > lapply(L, function(x) if (length(x) == 0) NA else x) [[1]] [1] 1 2 3 4 5 [[2]] [1] NA [[3]] [1] 2 3 4 [[4]] [1] NA [[5]] [1] NA [[6]] [1] 3 4 5 6 7 The key is that integer(0) has length 0. HTH, Marc Schwartz ______________________________________________ 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.
