\begin{figure}[!t]
\centering
\subfigure[Number of elements read] {\includegraphics[height=2in,width=2in,angle=-90]{52.eps}}
\subfigure[Size of disk files scanned] {\includegraphics[height=2in,width=2in,angle=-90]{51.eps}}
\subfigure[Execution time] {\includegraphics[height=2in,width=2in,angle=-90]{53.eps}}
\caption{ PathStack versus TJFast using XMark data }
\label{fig5}
\end{figure}

这种方法很好，即插入三个子图，可以将三个图片合成一个大图，而且每个图片还可以添加caption,即于subfigure[]中内进行解释说明。