psfrag: adding maths to postscript files

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`psfrag`: adding maths to postscript files

Many packages that produce postscript output don't provide good maths facilities. It's often easier to add the maths in later using the psfrag package. This lets you replace text in a postscript file (produced with xfig, matlab, etc) by a fragment of L^ATEX. For example, doing

\usepackage{psfrag}
...
\begin{figure}
\psfrag{MATHS}{$x^2$}
\includegraphics{foo.eps}
\end{figure}

would display the file with MATHS replaced by x². See the online psfrag documentation for details.

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