On Oct 12, 2012, at 2:52 AM, Markku Karhunen 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?
Read the help page for: ?"[" # especially regarding the drop parameter. -- David Winsemius, MD Alameda, CA, USA ______________________________________________ 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.
