[R] Adding LaTeX cross-references into Sweave plots
Mark Wardle
mark at wardle.org
Wed Feb 27 22:30:27 CET 2008
Hi.
I don't use figure titles (*) when generating figures for inclusion in
a latex document. Instead, I rely on the latex caption. Otherwise, one
has two titles for a figure.
If you want multiple plots with separate captions, then try subfigures.
Best wishes,
Mark
(*): try main=""
On 27/02/2008, Peter Dunn <dunn at usq.edu.au> wrote:
> Hi all
>
> I'm using Sweave and LaTeX, and love how they interact.
>
> But here's a different interaction I'm not sure how to achieve; I
> hope someone can help. I use a simple example, of course, to
> demonstrate.
>
> Suppose in my LaTeX document I have this:
>
> Here is a linear equation:
> \begin{equation}
> y = -1 + 3 x
> \label{EQ:example}
> \end{equation}
>
> This appears in the final product with an Equation number, say (1).
>
> Now suppose I wish to produce a graphic in R:
>
> <<fig=TRUE>>=
> plot( c(-1,1), c(-1,1), type="n",
> main="Graph of Eq (1)")
> abline(-1, 3)
> @
>
> All easy.
>
> But... how to I ensure the correct LaTeX label appears in the plot?
> You see, if I run LaTeX again, and my equation is no longer
> labelled (1) and changes to (say) label (3), I have to manually fix
> the Sweave code to read
>
> <<fig=TRUE>>=
> plot( c(-1,1), c(-1,1), type="n",
> main="Graph of Eq (3)")
> abline(-1, 3)
> @
>
> Any ideas of how that can be automated? I guess something like this
> (though this obviously will fail):
>
>
> <<fig=TRUE>>=
> plot( c(-1,1), c(-1,1), type="n",
> main="Graph of Eq (\label{EQ:equation})")
> abline(-1, 3)
> @
>
> Thanks as always.
>
> P.
>
> --
> Dr Peter Dunn | dunn <at> usq.edu.au
> Faculty of Sciences, USQ; http://www.sci.usq.edu.au/staff/dunn
> Aust. Centre for Sustainable Catchments: www.usq.edu.au/acsc
>
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>
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--
Dr. Mark Wardle
Specialist registrar, Neurology
Cardiff, UK
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