place multiple images on one line in latex (or even create a matrix of images)

to tile images in a figure, use the following code:

\begin{figure}[h]
\begin{center}$
\begin{array}{cc}
\includegraphics[width=2.5in]{image1.jpg} &
\includegraphics[width=2.5in]{image2.jpg}
\end{array}$
\end{center}
\caption{my caption}
\end{figure}

to place more than 2 images on a line, add extra 'c's to the {array} specification and follow each \includegraphics[]{} with an ampersand (&). to create a matrix of images, insert newlines using two slashes: for instance, to make a 2X2 matrix of images:

\begin{figure}[h]
\begin{center}$
\begin{array}{cc}
\includegraphics[width=2.5in]{image1.jpg} &
\includegraphics[width=2.5in]{image2.jpg} \\ \includegraphics[width=2.5in]{image1.jpg} &
\includegraphics[width=2.5in]{image2.jpg}
\end{array}$
\end{center}
\caption{my caption}
\end{figure}