[Rd] [PATCH] suggestions for R-lang manual

[Scott Kostyshak]

On Mon, Mar 3, 2014 at 7:48 AM, Martin Maechler
<maechler at stat.math.ethz.ch> wrote:
>>>>>> Scott Kostyshak <skostysh at princeton.edu>
>>>>>>     on Thu, 27 Feb 2014 16:43:02 -0500 writes:
>
>     > On Thu, Nov 21, 2013 at 1:17 AM, Scott Kostyshak <skostysh at princeton.edu> wrote:
>     >> Attached is a patch with suggestions for the R-lang manual at r64277.
>     >>
>     >> Below are a few comments (some are implemented in the patch):
>     >>
>     >> In the section "Objects", there is a table introduced by "The
>     >> following table describes the possible values returned by typeof". One
>     >> of the results is "any". Can "any" be returned by "typeof()" ?
>
> ANYSXP  is a valid internal type on the C level, and
> src/main/util.c  will make  typeof(ob) return "any"
> if you can get your hands at an R level object of that type.
> I'd guess you can only get it currently by using .Call() and
> using your own C code, .. but at least that way it must be possible.

Interesting to know.

>     >> Regarding the "Recycling rules" section,
>     >>
>     >> -One exception is that when adding vectors to matrices, a warning is not
>     >> -given if the lengths are incompatible.
>     >> - at c Is that a bug?
>     >> -
>     >>
>     >> was this a bug that was fixed?
>
> I did not investigate in details, but yes, I vaguely remember we
> had fixed that.  So indeed, it's fine you omitted the para in
> your patch.
>
>     >> I see the following behavior:
>     >>
>     >>> myvec <- 1:3
>     >>> mymat <- matrix(1:12, ncol=2)
>     >>> myvec <- 1:5
>     >>> myvec + mymat
>     >> [,1] [,2]
>     >> [1,]    2    9
>     >> [2,]    4   11
>     >> [3,]    6   13
>     >> [4,]    8   15
>     >> [5,]   10   12
>     >> [6,]    7   14
>     >> Warning message:
>     >> In myvec + mymat :
>     >> longer object length is not a multiple of shorter object length
>     >>>
>     >>
>     >> Regarding
>     >>
>     >> -The arguments in the call to the generic are rematched with the
>     >> -arguments for the method using the standard argument matching mechanism.
>     >> -The first argument, i.e.@: the object, will have been evaluated.
>     >> -
>     >>
>     >> this information is duplicated. See a few paragraphs up "When the
>     >> method is invoked it is called..."
>
>     >> Scott
>
> Thank you, Scott.
> Indeed, I've finally carefully looked at the patch, and applied
> it - for R-devel, to become R 3.1.0 in April.

Thanks, Martin!

Scott


--
Scott Kostyshak
Economics PhD Candidate
Princeton University

> Martin
>
>
>     >> --
>     >> Scott Kostyshak
>     >> Economics PhD Candidate
>     >> Princeton University
>
>     > The patch still applies cleanly (one offset) on r65090.
>
>     > Best,
>     > Scott