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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