Try A[[1]] <- NA
(It is of course up to you to do the tests, presumably using if(), to decide when to assign NA to the list element.) -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 On 3/31/12 7:53 PM, "michaelyb" <cel81009...@gmail.com> wrote: >Hello all, > >I am trying to automate a list to be filled in a FOR LOOP. >Basically I need to load info from a third source and store it into a >list. >This list goes to object "A"; The next list brought in by the LOOP goe to >object "B".. os on ans so forth. > >When the iteration on the LOOP goes well (which means it isn't empty) I >get >something like this: > >A >[[1]] > [,1] > [1,] "1130" > [2,] "1132" > [3,] "1134" > [4,] "1136" > [5,] "1138" > [6,] "1140" > [7,] "1142" > >[[2]] > [,1] > [1,] "7.54" > [2,] "6.55" > [3,] "4.20" > [4,] "3.50" > [5,] "2.92" > [6,] "2.42" > [7,] "1.99" > >However when the source is empty I get the following: > >A >[[1]] > [,1] > >[[2]] > [,1] > >I need to store NA in the latter one. I have tried A[is.na(A)] but I get >an >error message. >Any help would be greatly appreciated. > >Thank you in advance > >-- >View this message in context: >http://r.789695.n4.nabble.com/Filling-empty-List-in-a-FOR-LOOP-tp4522694p4 >522694.html >Sent from the R help mailing list archive at Nabble.com. > >______________________________________________ >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.
