# Inserting a figure in a SIAM template

I looked at a SIAM template example to understand how to insert a figure. In this template, it codes:

\begin{figure}[ht]
\vspace{2.5in}
\caption{{\rm Log}$_{10}$ of the residual norm versus the number of
{\rm GMRES$(m)$} iterations for the finite difference methods.}
\label{diff}
\end{figure}

However, it never seems to indicate a specific file to upload the image. A long time ago, i wrote a paper in the IEEE SIGS conference proceedings format, which used a command akin to:

\psfig{file=network_model.eps, height=2in, width=2in,}

inside the \begin{figure}...\end{figure} block. I tried using it in my AMS paper, but it produces an undefined control sequence error. What is the appropriate command to insert the figure from a local file?

UPDATE: Sorry, I erroneously stated earlier that the template was from AMS, when it was truly from SIAM.

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