On Tue, 21 Oct 2003, David Brahm wrote: > In R-patched_2003-10-20, subsetted 1-D arrays no longer get converted to > vectors. The NEWS file documents this change, as an indirect result of bug > report 4110. I just wanted to mention this can break code in some rather > obscure ways, such as this toy example: > > R> x <- sort(tapply(1:8, rep(1:4,2), sum)) # Was vector, now is 1D array > R> y <- matrix(1:4, 1,4) # 1x4 matrix > R> x + y # Used to return a 1x4 matrix > Error in x + y : non-conformable arrays > > I agree with the change, but I would beware that some puzzled users may not > associate new "tapply problems" with this news item.
We are aware of a couple of such problems, but they are code that should not have worked before. Unfortunately, in S tapply gives a vector and not a 1D array here .... > Also, *should* you be able to add a (4) array to a (1,4) array? No. You cannot in S. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
