I know it's documented and I know there are other ways to guard against this behaviour, once you know about this. The point is whether it might be worth it to make NCOL and NROW return the same value on NULL and make R more consistent/intuitive and possibly less error prone.
Regards, Simone On Sat, Sep 23, 2023 at 7:50 PM Duncan Murdoch <murdoch.dun...@gmail.com> wrote: > > It's been documented for a long time that NCOL(NULL) is 1. What > particular problems did you have in mind? There might be other ways to > guard against them. > > Duncan Murdoch > > On 23/09/2023 1:43 p.m., Simone Giannerini wrote: > > Dear list, > > > > I do not know what would be the 'correct' answer to the following but > > I think that they should return the same value to avoid potential > > problems and hard to debug errors. > > > > Regards, > > > > Simone > > --------------------------------------- > > > >> NCOL(NULL) > > [1] 1 > > > >> NROW(NULL) > > [1] 0 > > > >> sessionInfo() > > R version 4.3.1 RC (2023-06-08 r84523 ucrt) > > Platform: x86_64-w64-mingw32/x64 (64-bit) > > Running under: Windows 11 x64 (build 22621) > > > > Matrix products: default > > > > > > locale: > > [1] LC_COLLATE=Italian_Italy.utf8 LC_CTYPE=Italian_Italy.utf8 > > [3] LC_MONETARY=Italian_Italy.utf8 LC_NUMERIC=C > > [5] LC_TIME=Italian_Italy.utf8 > > > > time zone: Europe/Rome > > tzcode source: internal > > > > attached base packages: > > [1] stats graphics grDevices utils datasets methods base > > > > loaded via a namespace (and not attached): > > [1] compiler_4.3.1 > > > -- ___________________________________________________ Simone Giannerini Dipartimento di Scienze Statistiche "Paolo Fortunati" Universita' di Bologna Via delle belle arti 41 - 40126 Bologna, ITALY Tel: +39 051 2098262 Fax: +39 051 232153 https://simonegiannerini.net/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
