[R] Long command in Sweave

[Yihui Xie]

You can probably try knitr; see the manual for example:
https://github.com/downloads/yihui/knitr/knitr-manual.pdf

Code reformatting is based on the formatR package
(https://github.com/yihui/formatR/wiki), which tries to preserve your
comments while breaking your long lines into shorter ones.

However, the absolutely reliable answer is that you should do it by
yourself (either manually or with a decent code editor).

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: 515-294-2465 Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA



On Fri, Apr 13, 2012 at 9:17 AM, Wincent <ronggui.huang at gmail.com> wrote:
> Thanks, Gavin and Duncan.
>
> In that case, what I need is a suitable editor which can break the
> command properly.
>
> All the best
>
> On 13 April 2012 19:33, Gavin Simpson <gavin.simpson at ucl.ac.uk> wrote:
>> On Fri, 2012-04-13 at 17:46 +0800, Wincent wrote:
>>> Dear useRs,
>>>
>>> I am writing a vignette for a package, which contains long command like this,
>>> >reduce(Lipset_cs,"SURVIVAL",c("GNPCAP", "URBANIZA", "LITERACY", "INDLAB", "GOVSTAB"),explain="positive",remainder="exclude",case="CASEID")
>>> It is longer than the width a page and part of it will become "missing".
>>> Currently, I have to manually break the command into multiple lines.
>>> Is there a better way to handle such issue?
>>
>> Not that I am aware of.
>>
>>> It seems that others have raised similar question which seems to
>>> remain unsolved in a satisfactory fashion.
>>>
>>> Thanks for your kind attention in advance.
>>>
>>
>> 1) use some spacing and format the code over multiple lines
>>
>> reduce(Lipset_cs, "SURVIVAL",
>>       c("GNPCAP", "URBANIZA", "LITERACY", "INDLAB", "GOVSTAB"),
>>       explain="positive", remainder="exclude", case="CASEID")
>>
>> Isn't that more readable?! Any good R-aware editor should be able to
>> handle appropriate formatting of the code. I *never* write long lines in
>> my editor; I always break the code down to fit roughly into a 72 column
>> editor window.
>>
>> 2) if you want to force Sweave to respect your new formatting, use
>> argument `keep.source=TRUE` for the code chunk. Or set it document wide
>> using \SweaveOpts{option1=value1, option2=value2} etc in the preamble
>> (where optionX is one of the arguments and valueX what you want to set
>> that argument too.
>>
>> Thought IIRC, `keep.source=TRUE` is the default now and as such Sweave
>> will respect your formatting by default now - before it broke lines
>> where it could.
>>
>> In short get out of the habit of writing long lines of R code; you'll be
>> better in the long run laying your code out logically.
>>
>> HTH
>>
>> G
>>
>> --
>> %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
>>  Dr. Gavin Simpson             [t] +44 (0)20 7679 0522
>>  ECRC, UCL Geography,          [f] +44 (0)20 7679 0565
>>  Pearson Building,             [e] gavin.simpsonATNOSPAMucl.ac.uk
>>  Gower Street, London          [w] http://www.ucl.ac.uk/~ucfagls/
>>  UK. WC1E 6BT.                 [w] http://www.freshwaters.org.uk
>> %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
>>
>>
>>
>
>
>
> --
> Wincent Ronggui HUANG
> Sociology Department of Fudan University
> PhD of City University of Hong Kong
> http://homepage.fudan.edu.cn/rghuang/cv/
>
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