In S-PLUS 3.4 help on 'c' (http://www.uni-muenster.de/ZIV.BennoSueselbeck/s-html/helpfiles/c.html), there is no 'use.names' argument.
Because 'c' is a generic function, I don't think that changing formal arguments is good. In R devel r71344, 'use.names' is not an argument of functions 'c.Date', 'c.POSIXct' and 'c.difftime'. Could 'use.names' be documented to be accepted by the default method of 'c', but not listed as a formal argument of 'c'? Or, could the code that handles the argument name 'use.names' be removed? ---------------- >>>>> David Winsemius <dwinsemius at comcast.net> >>>>> on Tue, 20 Sep 2016 23:46:48 -0700 writes: >> On Sep 20, 2016, at 7:18 PM, Karl Millar via R-devel <r-devel at r-project.org> wrote: >> >> 'c' has an undocumented 'use.names' argument. I'm not sure if this is >> a documentation or implementation bug. > It came up on stackoverflow a couple of years ago: > http://stackoverflow.com/questions/24815572/why-does-function-c-accept-an-undocumented-argument/24815653#24815653 > At the time it appeared to me to be a documentation lag. Thank you, Karl and David, yes it is a documentation glitch ... and a bit more: Experts know that print()ing of primitive functions is, eehm, "special". I've committed a change to R-devel ... (with the intent to port to R-patched). Martin >> >>> c(a = 1) >> a >> 1 >>> c(a = 1, use.names = F) >> [1] 1 >> >> Karl ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel