每个子图下的子标题未对齐

Question

我目前有一个包含两个子图的图。我想在每个子图下添加标签，但无法对齐它们。从两个子图（即整个页面）的角度来看，第一个子标题似乎居中，这导致第二个子标题从我认为是新行的地方开始。更具体地说，我拥有的代码是：

\documentclass[10pt,journal,compsoc]{IEEEtran}

% *** SUBFIGURE PACKAGES ***
\ifCLASSOPTIONcompsoc
 \usepackage[caption=false,font=footnotesize,labelfont=sf,textfont=sf]{subfig}
\else
 \usepackage[caption=false,font=footnotesize]{subfig}
\fi
% subfig.sty, written by Steven Douglas Cochran, is the modern replacement
% for subfigure.sty, the latter of which is no longer maintained and is
% incompatible with some LaTeX packages including fixltx2e. However,
% subfig.sty requires and automatically loads Axel Sommerfeldt's caption.sty
% which will override IEEEtran.cls' handling of captions and this will result
% in non-IEEE style figure/table captions. To prevent this problem, be sure
% and invoke subfig.sty's "caption=false" package option (available since
% subfig.sty version 1.3, 2005/06/28) as this is will preserve IEEEtran.cls
% handling of captions.
% Note that the Computer Society format requires a sans serif font rather
% than the serif font used in traditional IEEE formatting and thus the need
% to invoke different subfig.sty package options depending on whether
% compsoc mode has been enabled.
%
% The latest version and documentation of subfig.sty can be obtained at:
% http://www.ctan.org/pkg/subfig

\usepackage{caption}
\usepackage{subcaption}


\begin{figure*}[!t]
    \begin{subfigure}
        \centering
        \includegraphics[trim={0, 0, 0, 0}, width=\columnwidth]{figures/plot1.pdf}
        \subcaption{Thing}
    \end{subfigure}
    \begin{subfigure}
        \centering
        \includegraphics[trim={0, 0, 0, 0}, width=\columnwidth]{figures/plot2.pdf}
        \subcaption{Thing}
    \end{subfigure}
\caption{Something.}
\label{fig:attention_score}
\end{figure*}

这就导致了：

我读过这个答案子图采用了子标题锚点的选项，因此我[c]在每个选项的右侧添加了一个\begin{subfigure}。结果如下：

这两张图片都不是我想要的。我应该如何配置才能让每个子标题都位于每个子图的正下方？谢谢。

Answer 1

您的 MWE 加载了subfig包，subcaption导致出现如下错误消息：

! Package subcaption Error: This package can't be used in cooperation with the subfig package.

为了解决这个问题，请删除subcaption包并使用\subfloat而不是subfigure环境，如下例所示：

\documentclass[10pt,journal,compsoc]{IEEEtran}

% *** SUBFIGURE PACKAGES ***
\ifCLASSOPTIONcompsoc
 \usepackage[caption=false,font=footnotesize,labelfont=sf,textfont=sf]{subfig}
\else
 \usepackage[caption=false,font=footnotesize]{subfig}
\fi

\usepackage[demo]{graphicx}% remove the demo option in your actual document.

\begin{document}


\begin{figure*}[!t]
\subfloat[Thing.]{\includegraphics[width=\columnwidth]{figures/plot1.pdf}}
\hfill
\subfloat[Thing.]{\includegraphics[width=\columnwidth]{figures/plot2.pdf}}
\caption{Something.}
\label{fig:attention_score}
\end{figure*}

\end{document}

Answer 2

您的测试文档必须生成以下类型的多条错误消息——不要忽视它们！

./main.tex:10: Missing number, treated as zero.
<to be read again> 
\protect 
l.10         \centering
                     
? 

这些消息是由于您的代码中的语法错误而生成的：您未能提供强制性的宽度参数环境subfigure。

如何修复此问题？\begin{subfigure}您不应只写 ，而应写\begin{subfigure}{\columnwidth}。

一旦修复了这些语法错误，测试文档就可以直接编译。不过，为了增加代码的安全性，我会删除（或注释掉）两个冗余指令，并在两个环境之间\centering插入一个指令，以最大限度地扩大它们的水平分离。\hfillsubfigure

\documentclass[twocolumn]{article}
\usepackage{subcaption}
\usepackage[demo]{graphicx} % remove 'demo' option in real document

\begin{document}

\begin{figure*}
    \begin{subfigure}{\columnwidth} % <-- added '{\columnwidth}'
        %\centering % redundant
        \includegraphics[trim={0, 0, 0, 0}, width=\columnwidth]{figures/plot1.pdf}
        \subcaption{Thing 1}
    \end{subfigure}%
    \hfill % <-- maximize horizontal separation (subject to text block width constraint)
    \begin{subfigure}{\columnwidth} % <-- added '{\columnwidth}'
        %\centering % redundant
        \includegraphics[trim={0, 0, 0, 0}, width=\columnwidth]{figures/plot2.pdf}
        \subcaption{Thing 2}
    \end{subfigure}
\caption{Something.}
\label{fig:attention_score}
\end{figure*}

\end{document}

Answer 3

\documentclass[12pt]{report}
\usepackage[letterpaper,top=1in,bottom=1in,right=1in,left=1in]{geometry}
    \usepackage[demo]{graphicx}
\usepackage{subcaption}
    \begin{document}
        \begin{figure}[h]
                    \begin{subfigure}[t]{0.45\textwidth}
                    \includegraphics[trim={0, 0, 0, 0}, width=\textwidth]{gfx-1}
                    \caption{Caption 1}
                \end{subfigure}
                \hfill
                    \begin{subfigure}[t]{0.45\textwidth}
                        \includegraphics[trim={0, 0, 0, 0}, width=\textwidth]{gfx-1}
                        \caption{Caption 2}
                    \end{subfigure}
        \caption{center caption}
        \end{figure}
    \end{document}