On Oct 12, 2012, at 4:52 AM, Markku Karhunen <markku.karhu...@helsinki.fi> wrote:
> > Hi all, > > I've been wondering for a long time why R drops the dimensions of an > array/matrix when you try to take a subset of one column. I mean this: > > dim(A) > [1] 2 5 2 > B=A[1,,] > dim(B) > 5 2 # so now dim(B)[3] doesn't work > C=B[2,] > dim(C) > NULL # so now nrow(C) doesn't work > > Typically, you can get rid of this by writing as.matrix, as.array(...) but > that generates extra lines of code. This is really annoying. Does anybody > know how to turn this behaviour off? > > best, > Markku Karhunen > Uni. Helsinki You can save yourself a lot of time if you visit the R FAQ as your first action item when such questions come up. In this case: http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-do-my-matrices-lose-dimensions_003f Regards, 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.
