R help - May 2008 - Sweave does not respect width

Hello,

I'm learning to use Sweave, and I've run into a problem: sometimes, when
entering long lines of input and using long variable names, Sweave will not
insert linebreaks in a way that respects the width setting. This causes
undesirable overflows into the margins in the latex file. For example,
consider the following document (adapted from the GLM example):

\documentclass{article}
\begin{document}

<<setup,include=FALSE,echo=FALSE>>options(width=80)
@

<<test>>countsasdfasdfasdf <- c(18,17,15,20,10,20,25,13,12)
outcomeasdfasdfasdf <- gl(3,1,9)
treatmentasdfasdfasdfasdf <- gl(3,3)
glm.D93 <- glm(countsasdfasdfasdf ~ outcomeasdfasdfasdf +
treatmentasdfasdfasdfasdf, family=poisson())
@

\end{document}

When I compile this, treatmentasdfasdfasdfasdf sticks out into the right
margin. The linebreak is inserted after the last comma, so that the line as
printed is 85 characters long, even though I set width to 80 at the top.
Ideally, Sweave would set the linebreak after the last plus symbol.

There is a simple workaround that I have been using: if a line causes
problems, set width to something smaller before the line, and set it back
afterwards. It's pretty clumsy though, and I wonder if there is a better
way. My understanding is that there is no way to manually set linebreaks,
what a pity!

I am using R 2.6.2 and the MacTex 2007 distribution. If this problem has
been fixed in a recent version, I apologize.

Cheers,
Enrico

	[[alternative HTML version deleted]]

Enrico,

try 

<<test, keep.source=TRUE>>
that should keep your linebreaks.

Cheers

Andrew


On Mon, May 26, 2008 at 03:15:39PM -0400, Enrico Rossi
wrote:
> Hello,
> 
> I'm learning to use Sweave, and I've run into a problem: sometimes,
when
> entering long lines of input and using long variable names, Sweave will not
> insert linebreaks in a way that respects the width setting. This causes
> undesirable overflows into the margins in the latex file. For example,
> consider the following document (adapted from the GLM example):
> 
> \documentclass{article}
> \begin{document}
> 
> <<setup,include=FALSE,echo=FALSE>>> options(width=80)
> @
> 
> <<test>>> countsasdfasdfasdf <-
c(18,17,15,20,10,20,25,13,12)
> outcomeasdfasdfasdf <- gl(3,1,9)
> treatmentasdfasdfasdfasdf <- gl(3,3)
> glm.D93 <- glm(countsasdfasdfasdf ~ outcomeasdfasdfasdf +
> treatmentasdfasdfasdfasdf, family=poisson())
> @
> 
> \end{document}
> 
> When I compile this, treatmentasdfasdfasdfasdf sticks out into the right
> margin. The linebreak is inserted after the last comma, so that the line as
> printed is 85 characters long, even though I set width to 80 at the top.
> Ideally, Sweave would set the linebreak after the last plus symbol.
> 
> There is a simple workaround that I have been using: if a line causes
> problems, set width to something smaller before the line, and set it back
> afterwards. It's pretty clumsy though, and I wonder if there is a
better
> way. My understanding is that there is no way to manually set linebreaks,
> what a pity!
> 
> I am using R 2.6.2 and the MacTex 2007 distribution. If this problem has
> been fixed in a recent version, I apologize.
> 
> Cheers,
> Enrico
> 
> 	[[alternative HTML version deleted]]
> 
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-- 
Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-6410
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
http://www.ms.unimelb.edu.au/~andrewpr
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