Undocumented 'use.names' argument to c()

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.

c(a = 1)

a
1

c(a = 1, use.names = F)

[1] 1

Karl

______________________________________________
R-devel at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

David Winsemius
Alameda, CA, USA

David Winsemius <dwinsemius at comcast.net>
    on Tue, 20 Sep 2016 23:46:48 -0700 writes:

>> 
    >> '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