[R] The L Word

[Tsjerk Wassenaar]

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
>
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>
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-- 
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