[R] R echo code chunk runs off the page using Lyx and Sweave

[Duncan Murdoch]

Mark Connolly wrote:
> Thanks.  I guess it kind of works for me as well.  The contents of a 
> dataframe will display in the specified width, but doing a 
> str(dataframe) will happily run past the width set in options and use up 
> the device width (command line).  I guess this may be my issue.  
> Options(width) does work for displaying the contents of an object (a 
> dataframe, for example) in the document, but whatever device geometry 
> exists for long lines of R output seems to be wider than my document, 
> and long code chunks, str(dataframe) output and the like run past the 
> edge of the document page margin when PDF is rendered. 
>
> So I guess the question is: Can I set device geometry somewhere so that 
> chunks of R code wrap inside a specified width when a document is 
> rendered?  I am using Lyx, but I think this may be between Latex and R 
> (as orchestrated by Sweave).  Maybe the answer for Latex is the same 
> answer for Lyx.
>   

I don't think so.  There is a strwrap() function that can do wrapping, 
but it might not produce beautiful output.

For example, if x is something where str(x) produces lines that are too 
long, you could do

cat(strwrap(capture.output(str(x)), width=20), sep="\n")

to get the results displayed in width 20.

Duncan Murdoch
> Ista Zahn wrote:
>   
>> options(width=n) is supposed to work, and does for me. I don't use Lyx though...
>>
>> -Ista
>> On Tue, Nov 10, 2009 at 4:27 PM, Mark Connolly <mark_connolly at acm.org> wrote:
>>   
>>     
>>> I am not really sure where in the interactions this is handled, but I would
>>> like to keep echo-ed R code chunks from running past the right margin and
>>> off the page.  I started with R and options(width=n), but this does not seem
>>> to do anything (in the context of a document -- line command works just
>>> fine).   I have beating my head against different Lyx document settings
>>> without anything to show.  Anyone point me in the right direction?
>>>
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>>
>>
>>     
>
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