On Sep 14, 2012, at 15:25 , Prof Brian Ripley wrote: > On 13/09/2012 21:48, Bert Gunter wrote: >> Bill: >> >> as.data.frame.character() has no nm, argument, so providing one causes >> the error as you can see from the code. Presumably, this is what you >> meant by bug/inconsistency, right? > > This is using an undocumented argument, 'nm'. I don't believe anything is > said about what might happen if you do that except that it will be passed to > methods -- they are not obliged to accept it. > > If it were intended for this to be a feature, I think the author might have > chosen a less opaque name than 'nm'.
It wasn't, but the author (me) might have chosen a _more_ opaque name if he had thought it necessary to keep people from using undocumented arguments. As it happened, I think I just promoted a variable name inside as.data.frame.vector to become an argument. But it was a long time ago, in a different job, and besides.... > > Where we go from here is under discussion in R-core. > >> >> -- Bert >> >> On Thu, Sep 13, 2012 at 1:32 PM, William Dunlap <wdun...@tibco.com> wrote: >>> Is the following behavior with as.data.frame(nm=...) a bug? It is an >>> inconsistency: >>> >>>> as.data.frame(LETTERS[1:10], nm="FirstTenLetters") >>> Error in as.data.frame.vector(x, ..., nm = nm) : >>> formal argument "nm" matched by multiple actual arguments >>> >>> nm= works for integer arguments: >>> >>>> as.data.frame(1:10, nm="OneToTen") >>> OneToTen >>> 1 1 >>> 2 2 >>> 3 3 >>> 4 4 >>> 5 5 >>> 6 6 >>> 7 7 >>> 8 8 >>> 9 9 >>> 10 10 >>> >>> Bill Dunlap >>> Spotfire, TIBCO Software >>> wdunlap tibco.com >>> >>> ______________________________________________ >>> R-devel@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-devel >> >> >> > > > -- > Brian D. Ripley, rip...@stats.ox.ac.uk > 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 > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Peter Dalgaard, Professor Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
