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未出现子图的参考

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未出现子图的参考

考虑这个例子：

\begin{figure}[H]
  \begin{center} 
    \subfigure[]{%
      \includegraphics[height=4cm,width=4.5cm]{Fig_10(a)_Current_NLL_Sag}}
      \label{subfig:real time single phase current NLL sag}
    \subfigure[]{%
      \includegraphics[height=4cm,width=4.5cm]{Fig_10(b)_Current_NLL_LL_Sag}} 
      \label{subfig:real time single phase current NLL LL sag}
    \subfigure[]{%
      \includegraphics[height=4cm,width=4.5cm]{Fig_10(c)_Voltage_NLL_LL_Sag}} 
      \label{subfig:real time single phase voltage NLL LL sag}
  \caption{%
    \small \sl
    Opal-RT results under voltage sag condition: $(a)$ load,
    source and compensating current with NLL only $(b)$ load,
    source and compensating current with NLL and LL $(c)$ source,
    load and series injected voltage with NLL and LL
  }
  \end{center} 
  \label{Fig:real time single phase sag}
\end{figure}

与我预期相反，PDF 仅显示“？？”

答案1

你需要

\subfigure[<caption>]{<image>\label{..}}

不是

\subfigure[<caption>]{<image>}\label{..}

请注意，\label放在最后一个右括号之前。完整示例如下。我还center用以下代码替换了环境：\centering，参见。RevTeX 文章中的奇怪图形编号

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{subfigure}

\begin{document}
\begin{figure}
\centering
        \subfigure[]{\includegraphics[height=4cm,width=4.5cm]{Fig_10(a)_Current_NLL_Sag}\label{subfig:real time single phase current NLL sag}}
        \subfigure[]{\includegraphics[height=4cm,width=4.5cm]{Fig_10(b)_Current_NLL_LL_Sag}\label{subfig:real time single phase current NLL LL sag}}
        \subfigure[]{\includegraphics[height=4cm,width=4.5cm]{Fig_10(c)_Voltage_NLL_LL_Sag}\label{subfig:real time single phase voltage NLL LL sag}}

        \caption{\small \slshape Opal-RT results under voltage sag condition: $(a)$ load, source and compensating current with NLL only $(b)$ load, source and compensating current with NLL and LL $(c)$ source, load and series injected voltage with NLL and LL}
    \label{Fig:real time single phase sag}
\end{figure}

Fig.~\ref{Fig:real time single phase sag} has
\ref{subfig:real time single phase current NLL sag},
\ref{subfig:real time single phase current NLL LL sag}, and
\ref{subfig:real time single phase voltage NLL LL sag}
\end{document}

但请注意，该subfigure包被视为已弃用，因此通常建议迁移到较新的subcaption包（或可能subfig）。不过，该包的语法不同。以下是使用 的一个示例subcaption：

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{subcaption}
\captionsetup[figure]{textfont={small,sl}}
\begin{document}
\begin{figure}
\centering
        \subcaptionbox{\label{subfig:real time single phase current NLL sag}}{\includegraphics[height=4cm,width=4.5cm]{Fig_10(a)_Current_NLL_Sag}}
        \subcaptionbox{\label{subfig:real time single phase current NLL LL sag}}{\includegraphics[height=4cm,width=4.5cm]{Fig_10(b)_Current_NLL_LL_Sag}}
        \subcaptionbox{\label{subfig:real time single phase voltage NLL LL sag}}{\includegraphics[height=4cm,width=4.5cm]{Fig_10(c)_Voltage_NLL_LL_Sag}}
        \caption{Opal-RT results under voltage sag condition: $(a)$ load, source and compensating current with NLL only $(b)$ load, source and compensating current with NLL and LL $(c)$ source, load and series injected voltage with NLL and LL}
    \label{Fig:real time single phase sag}
\end{figure}

Fig.~\ref{Fig:real time single phase sag} has
\ref{subfig:real time single phase current NLL sag},
\ref{subfig:real time single phase current NLL LL sag}, and
\ref{subfig:real time single phase voltage NLL LL sag}
\end{document}

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