Change Figure Numbering For Appendix

Answer :

Redefine \thefigure when your appendices start, and set the figure counter to zero at the beginning of each appendix.

\documentclass{article} \begin{document} \begin{figure} \centering\rule{1cm}{1cm} \caption{This is a figure} \end{figure} \appendix \renewcommand\thefigure{\thesection.\arabic{figure}}     \section{A nice appendix} \setcounter{figure}{0}     \begin{figure} \centering\rule{1cm}{1cm} \caption{This is a figure in appendix A} \end{figure} \end{document} 

You can use the chngcntr package which includes the command \counterwithin.

Using this as \counterwithin{figure}{section} changes the figure numbering from that point on so that the section number is included and resets the numbering of figures at the beginning each subsequent section. An example is:

\documentclass{article}  \usepackage{chngcntr}  \begin{document}  \section{Introduction}  \subsection{Problem description}  \begin{figure}[htp]   \centering Figure   \caption{Call this figure 1.}   \label{fig1} \end{figure}  \appendix \counterwithin{figure}{section}  \section{Figures}  \begin{figure}[htp]   \centering Figure   \caption{Call this figure A.1.}   \label{figa1} \end{figure}  \begin{figure}[htp]   \centering Figure   \caption{Call this figure A.2.}   \label{figa2} \end{figure}  \end{document} 

A simple way to prepend an A to your appendix figures and to have the counter reset is to paste the following two lines before your first figure of the appendix.

\renewcommand{\thefigure}{A\arabic{figure}}  \setcounter{figure}{0} 

as illustrated here.