我需要有带有适当标签的子图以便交叉引用,但不需要任何标题。如何做到这一点?
\begin{figure}[h]
\centering
\begin{subfigure}[t]{0.49\textwidth}
\centering
\includegraphics[angle=0,width=0.8\textwidth]{sig.png}
\label{sig}
\end{subfigure}
\hfill
\begin{subfigure}[t]{0.49\textwidth}
\centering
\includegraphics[angle=0,width=\textwidth]{sigdc.png}
\label{sigdc}
\end{subfigure}
\caption{ (a) A common caption to all figures}
\end{figure}