[R] Problem: Sweave and math environments

[Charles C. Berry]

On Wed, 5 Nov 2008, David Scott wrote:

> On Tue, 4 Nov 2008, Duncan Murdoch wrote:
>
>>  On 11/4/2008 9:15 AM, Sarah Goslee wrote:
>> >  I'm sure there are a variety of ways around this. My chosen solution
>> >  is to replace
>> > 
>> >  mydata$somevar
>> >  with
>> >  mydata[, "somevar"]
>> > 
>> >  Sarah
>> > 
>>
>>  You should almost never need to modify valid R code to work with Sweave.
>>  (There are a few exceptions:  code that illustrates errors, or code that
>>  requires interaction with a user, etc.)
>>
>>  There's nothing wrong with including mydata$somevar in an Sweave code
>>  chunk.
>>
>>  Duncan Murdoch
>> 
>
> There is nonetheless a point to what she is suggesting. In my experience the 
> $ tends to confuse the editor so the highlighting gets confused amongst other 
> things

If 'the editor' is emacs + ESS, it sometimes happens that the chunk vector 
needs to be updated and that until it is some dollar signs will be seen as 
LaTeX by the syntax highlighting.

If this is your problem,

 	Noweb --> Miscellaneous --> Update the Chunk Vector

or

 	M-n C-l

should fix it.

HTH,

Chuck

>
> David Scott
>
> _________________________________________________________________
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>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
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