[Rd] Error in documentation of "merge"
smckinney at bccrc.ca
Sat Nov 5 02:28:03 CET 2011
> -----Original Message-----
> From: r-devel-bounces at r-project.org [mailto:r-devel-bounces at r-project.org]
> On Behalf Of Kasper Daniel Hansen
> Sent: November-04-11 5:26 AM
> To: peter dalgaard
> Cc: r-devel at r-project.org
> Subject: Re: [Rd] Error in documentation of "merge"
> On Fri, Nov 4, 2011 at 8:20 AM, peter dalgaard <pdalgd at gmail.com> wrote:
> > On Nov 4, 2011, at 13:11 , Rainer M Krug wrote:
> >> Hi
> >> there seems to be an error in the documentation of the "merge" function:
> >> Arguments:
> >> x, y: data frames, or objects to be coerced to one.
> >> by, by.x, by.y: specifications of the common columns. See ŒDetails‚.
> >> all: logical; Œall = L‚ is shorthand for Œall.x = L‚ and Œall.y =
> >> L‚.
> >> The "L" should be a T or a TRUE.
> > I think it's on purpose: L indicates a logical value, TRUE _or_ FALSE.
> I agree with Peter here. But it did make me pause the first time I
> read it on the help page years ago and furthermore, I think this is at
> least the second time where this particular formulation has been
> questioned on R-devel. I am not an index of R help pages, but I
> cannot recall seeing the 'L' as shorthand for logical. I suggest
> changing the formulation since it seems that several people have been
> confused, for example by writing out 'logical' instead of 'L'.
Seconded, as L does have another use as well now in numeric constants
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