按小节编号

Question

我想要在以下 MWE 的附录中对每个小节的图进行编号：应该读作“图 A.1”而不是“图 2”。

\documentclass{article}

\usepackage{amsmath}  
\numberwithin{equation}{section}

\usepackage[demo]{graphicx}   
\usepackage{caption}
\captionsetup[figure]{figurewithin=section}

\newcommand*{\appheading}[1][Appendix]{%
  \setcounter{secnumdepth}{0}\section{#1}\setcounter{secnumdepth}{3}%
  \renewcommand*{\thesubsection}{\Alph{subsection}}
  \numberwithin{equation}{subsection}  
}

\begin{document}

\section{Foo} 

\begin{equation}
  x = 4
\end{equation}

\begin{figure}[htbp!]
  \centering
  \includegraphics{foo}
  \caption{Fooo}
\end{figure}

\appheading
\appendix
\subsection{Baz}

\begin{equation}
  y = 3
\end{equation}

\begin{figure}[htbp!]
  \centering
  \includegraphics{baz}
  \caption{Baz}
\end{figure}

\end{document}

我尝试更换thefigure计数器并使用该chngcntr包，但无法使其工作。

Answer 1

使用\numberwithin该figurewithin选项：

\documentclass{article}

\usepackage{amsmath}  
\numberwithin{equation}{section}

\usepackage[demo]{graphicx}   
\usepackage{caption}
\numberwithin{figure}{section}

\newcommand*{\appheading}[1][Appendix]{%
  \setcounter{secnumdepth}{0}\section{#1}\setcounter{secnumdepth}{3}%
  \renewcommand*{\thesubsection}{\Alph{subsection}}
  \numberwithin{equation}{subsection}
  \numberwithin{figure}{subsection}
}

\begin{document}

\section{Foo} 

\begin{equation}
  x = 4
\end{equation}

\begin{figure}[htbp!]
  \centering
  \includegraphics{foo}
  \caption{Fooo}
\end{figure}

\appheading
\appendix
\subsection{Baz}

\begin{equation}
  y = 3
\end{equation}

\begin{figure}[htbp!]
  \centering
  \includegraphics{baz}
  \caption{Baz}
\end{figure}

\end{document}

---

你为什么不使用\part*这些技巧呢？

\documentclass{article}

\usepackage{amsmath}  
\numberwithin{equation}{section}

\usepackage[demo]{graphicx}   
\usepackage{caption}
\numberwithin{figure}{section}

\newcommand*{\appheading}[1][Appendix]{%
  \part*{#1}
  \renewcommand*{\thesection}{\Alph{section}}
}

\begin{document}

\section{Foo} 

\begin{equation}
  x = 4
\end{equation}

\begin{figure}[htbp!]
  \centering
  \includegraphics{foo}
  \caption{Fooo}
\end{figure}

\appheading
\appendix
\section{Baz}

\begin{equation}
  y = 3
\end{equation}

\begin{figure}[htbp!]
  \centering
  \includegraphics{baz}
  \caption{Baz}
\end{figure}

\end{document}

Answer 2

在该行之后立即插入以下两行\subsction{Baz}：

\setcounter{figure}{0}
\setcounter{section}{1}