On Oct 1, 2015, at 6:22 PM, Rolf Turner wrote:
> On 02/10/15 10:54, peter dalgaard wrote:
>
>>> On 01 Oct 2015, at 23:04 , Rolf Turner <r.tur...@auckland.ac.nz>
>>> wrote:
>>>
>>> On 02/10/15 03:45, David L Carlson wrote:
>>>
>>> <SNIP>
>>>
>>>> If you want the month names:
>>>>
>>>>> mnt <- c("Jan", "Feb", "Mar", "Apr", "May", "Jun",
>>>> + "July", "Aug", "Sep", "Oct", "Nov", "Dec")
>>>>> dimnames(tbl)$Month <- mnt
>>>
>>> <SNIP>
>>>
>>> Unnecessary typing; there is a built-in data set "month.abb" (in
>>> the "base" package) that is identical to your "mnt".
>>>
>>> Difficult (nearly impossible!) to find, but, if you can't quite
>>> remember the name! I *knew* I'd seen it, so I persisted and
>>> eventually tracked it down.
>>>
>>> Strangely ??month or help.search("month") yield no trace of it.
>>> Pages and pages of (useless!) output but no sign of "month.abb"
>>> (nor of "month.name" which gives the unabbreviated month names).
>>>
>>> Can anyone explain to me why "??" and help.search() are of no help
>>> here?
>>
>> Umm,
>>
>> ------- Help files with alias or concept or title matching ‘month’
>> using fuzzy matching:
>>
>>
>> base::Constants Built-in Constants Aliases: month.abb,
>> month.name .... -------
>
> Hmm. When I did ??month I got a completely different display. It
> contained *absolutely no* mention of month.abb. That *seems* to be
> because I have help_type set to "html". When I re-set help_type to
> "text", I get a display like unto the one that you obtained (and it does
> indeed lead one to month.abb).
>
> It seems to me ver' strange that one gets a different collection of
> information under help_type="text" than one does under help_type="html".
> If I were me, I would classify this as a bug.
>
>> Also, entering "month<TAB><TAB>" gives the completions
>>
>>> month
>> month.abb monthplot months.Date month.name months
>> months.POSIXt
>
> Yes, I eventually managed to come up with this trick as well. But that is
> not really relevant to the phenomenon that "??" or help.search() don't work
> effectively, or at least not consistently (the effectiveness appearing to
> depend --- for some bizarre reason --- on the value of help_type).
>
> cheers,
>
> Rolf
>
> P.S. I have been unable to find a corresponding vector of the names of the
> days of the week, although I have a very vague recollection of the existence
> of such a vector. Does it exist, and if so what is it called?
It's could called up by strptime because it is mapped to a character vector by
the internationalization database:
> format( as.Date(1:7)+2, format="%A")
[1] "Sunday" "Monday" "Tuesday" "Wednesday" "Thursday" "Friday"
[7] "Saturday"
> Or is my recollection an illusion brought on by advancing senility?
>
> R.
>
> --
> Technical Editor ANZJS
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
>
> ______________________________________________
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David Winsemius
Alameda, CA, USA
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