[R] The L Word

[Bryan Hanson]

This came up at least once before, with regard to where it is  
documented:

http://r.789695.n4.nabble.com/Where-are-usages-like-quot-2L-quot-documented-tt831061.html

I haven't looked around much to see if the documentation has changed,  
but in a quick look at ?integer I don't see the concept mentioned.  Of  
course, it could be somewhere else.  But, the concept is pretty  
straightfoward.

Bryan
****************
Prof. Bryan Hanson
Dept of Chemistry & Biochemistry
DePauw University
602 S. College Ave
Greencastle IN 46135 USA

On Feb 24, 2011, at 3:13 AM, Tal Galili wrote:

> Thank you all for the answers.
>
> So if I may extend on the question -
> When is it important to use 'Literal integer'?
> Under what situations could not using it cause problems?
> Is it a matter of efficiency or precision or both?
>
> Thanks,
> Tal
>
>
>
>
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>
> On Wed, Feb 23, 2011 at 6:15 PM, Tsjerk Wassenaar  
> <tsjerkw at gmail.com> wrote:
>
>> Hi Gene,
>>
>> It means 'Literal integer'.
>> So 1L is a proper integer 1, and 0L is a proper integer 0.
>>
>> Hope it helps,
>>
>> Tsjerk
>>
>> On Wed, Feb 23, 2011 at 5:08 PM, Gene Leynes <gleynes+r at gmail.com>  
>> wrote:
>>> I've been wondering what L means in the R computing context, and was
>>> wondering if someone could point me to a reference where I could  
>>> read
>> about
>>> it, or tell me what it's called so that I can search for it  
>>> myself.  (L
>> by
>>> itself is a little too general for a search term).
>>>
>>> I encounter it in strange places, most recently in the "save"
>> documentation.
>>>
>>> save(..., list = character(0L),
>>>>     file = stop("'file' must be specified"),
>>>>     ascii = FALSE, version = NULL, envir = parent.frame(),
>>>>     compress = !ascii, compression_level,
>>>>     eval.promises = TRUE, precheck = TRUE)
>>>>
>>>
>>> I remember that you can also find it when you step inside an apply
>> function:
>>>
>>>> sapply(1:10, function(x)browser())
>>>> Called from: FUN(1:10[[1L]], ...)
>>>>
>>>
>>> I apologize for being vague, it's just something that I would like  
>>> to
>>> understand about the R language (the R word).
>>>
>>> Thank you!
>>>
>>> Gene
>>>
>>>       [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>>
>> --
>> Tsjerk A. Wassenaar, Ph.D.
>>
>> post-doctoral researcher
>> Molecular Dynamics Group
>> * Groningen Institute for Biomolecular Research and Biotechnology
>> * Zernike Institute for Advanced Materials
>> University of Groningen
>> The Netherlands
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.