Thanks to all. In my application I can always arrange to have the shorter matrix come second which is to be filled with NA. I Will try the ts approach. Words work less effectively for me. This could have work if plain R can be more accommodating in cbind. Thanks.
Steven from iPhone > On Jun 29, 2025, at 11:03 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > > This capability that ts objects have seems ill-advised. There is always a > meaning associated with which row and column a matrix has, and this assumes > that the shorter dimension is associated with times corresponding to the > first rows of the longer matrix. In general you don't know whether the NAs > should be at the beginning or whether there are missing rows in the middle, > or even whether the time intervals don't overlap at all or are on different > intervals. IMO there should be a separate step required before cbind that > resolves these questions and appropriately extends the dimension rather than > embedding this particular resolution approach into the cbind function. It > could be as simple as an "extend Rows" function... as long as it is explicit > in the calling code where this strategy can more easily be identified, > debated, and fixed. > >> On June 29, 2025 4:56:23 AM PDT, Gabor Grothendieck >> <ggrothendi...@gmail.com> wrote: >> cbind does work on differently shaped ts objects so: >> >> a <- matrix(1:12,nrow=6) >> b <- matrix(5:12,nrow=4) >> >> tmp <- cbind(ts(a), ts(b)) >> array(tmp, dim(tmp)) >> >> giving >> >> [,1] [,2] [,3] [,4] >> [1,] 1 7 5 9 >> [2,] 2 8 6 10 >> [3,] 3 9 7 11 >> [4,] 4 10 8 12 >> [5,] 5 11 NA NA >> >>> On Thu, Jun 26, 2025 at 6:47 AM Steven Yen <st...@ntu.edu.tw> wrote: >>> >>> I'd like to cbind matrices of different number of rows, with missing values >>> filled by "NA". I used dplyr. The following is obviously not working. Help >>> appreciated. >>> >>>> library(dplyr) >>>> a<-matrix(1:12,nrow=6); a >>> [,1] [,2] >>> [1,] 1 7 >>> [2,] 2 8 >>> [3,] 3 9 >>> [4,] 4 10 >>> [5,] 5 11 >>> [6,] 6 12 >>>> b<-matrix(5:12,nrow=4); b >>> [,1] [,2] >>> [1,] 5 9 >>> [2,] 6 10 >>> [3,] 7 11 >>> [4,] 8 12 >>>> cbind.fill(a,b) >>> Error in cbind.fill(a, b) : could not find function "cbind.fill" >>> >>> Steven from iPhone >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> https://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >> >> >> > > -- > Sent from my phone. Please excuse my brevity. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
