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无法引用数据

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无法引用数据

我试图用 [1] 引用 [2] 中的图形。图形在里面multicols。当我编译它时，我只得到??s ref。我在 [3] 中得到错误。我做错了什么？

[1] 参考图片

Fig.~\ref{fig:makespan:performance:trendline:A}
Fig.~\ref{fig:makespan:performance:trendline:B}
Fig.~\ref{fig:makespan:performance:trendline:C}

[2] 图片

\begin{figure*}[t]
  \centering
  \begin{multicols*}{3}
    \includegraphics[trim=0mm 0mm 17mm 0mm,width=.31\textwidth]{graphs/global-performance-A.pdf}\par\caption*{a) A}\label{fig:makespan:performance:trendline:A}
    \includegraphics[trim=0mm 0mm 17mm 0mm,width=.31\textwidth]{graphs/global-performance-B.pdf}\par\caption*{b) B}\label{fig:makespan:performance:trendline:B}
    \includegraphics[trim=0mm 0mm 17mm 0mm,width=.31\textwidth]{graphs/global-performance-C.pdf}\par\caption*{c) C}\label{fig:makespan:performance:trendline:C}
  \end{multicols*}
\label{fig:makespan:performance:trendline}
\caption{Job makespan of A, B, and C executions (no faults).}
\label{fig:makespan:performance:trendline}
\end{figure*}

[3]日志文件

LaTeX Warning: Reference `fig:makespan:performance:trendline:A' on page
7 undefined on input line 509.

Package caption Warning: \label without proper \caption on input line 524.
See the caption package documentation for explanation.

Package multicol Warning: multicols* inside a box does not make sense.
(multicol)                Going to balance anyway on input line 522.

答案1

从本质上来说，将三幅图像排列在单独的列中确实可以实现交叉引用。相反，我建议您将图像及其相关\caption说明放在整体环境内的\label单独环境中。subfigurefigure*

\documentclass[twocolumn]{article} % Use a two-column layout
\usepackage{subcaption} % for 'subcaption' environment
\usepackage[demo]{graphicx} % omit 'demo' option in real document
\begin{document}

\begin{figure*}[t!]

\begin{subfigure}{0.31\textwidth}
\includegraphics[trim=0mm 0mm 17mm 0mm,width=\linewidth]{graphs/global-performance-A.pdf}
\caption{A}
\label{fig:makespan:performance:trendline:A}
\end{subfigure}
\hspace*{\fill} % maximize whitespace between subfigures
\begin{subfigure}{0.31\textwidth}
\includegraphics[trim=0mm 0mm 17mm 0mm,width=\linewidth]{graphs/global-performance-B.pdf}
\caption{B}
\label{fig:makespan:performance:trendline:B}
\end{subfigure}
\hspace*{\fill} % maximize whitespace between subfigures
\begin{subfigure}{0.31\textwidth}
\includegraphics[trim=0mm 0mm 17mm 0mm,width=\linewidth]{graphs/global-performance-C.pdf}
\caption{C}\label{fig:makespan:performance:trendline:C}
\end{subfigure}

\caption{Job makespan of A, B, and C executions (no faults).}
\label{fig:makespan:performance:trendline}
\end{figure*}

Fig.~\ref{fig:makespan:performance:trendline:A},
Fig.~\ref{fig:makespan:performance:trendline:B},
Fig.~\ref{fig:makespan:performance:trendline:C}
\end{document}

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