按 col-major 顺序标记图形

Question

使用下面的命令，我可以生成一个 2x3 的表格图形：

\begin{figure}[htbp]
\centering
\begin{tabular}{ccc}
\subfloat[configuration 1]{\includegraphics[height=1.8in]{8}} &
\subfloat[configuration 2]{\includegraphics[height=1.8in]{9}} &
\subfloat[configuration 3]{\includegraphics[height=1.8in]{7}} \\
\subfloat[configuration 4]{\includegraphics[height=1.8in]{8}} &
\subfloat[configuration 5]{\includegraphics[height=1.8in]{9}} &
\subfloat[configuration 6]{\includegraphics[height=1.8in]{8}}
\end{tabular}
\caption{Here goes the caption.}
\label{fig6}
\end{figure}

我会得到：

图形按行优先顺序标记。我的问题是，我怎样才能按照 col-major 顺序标记它们才能得到如下图所示的效果？

Answer 1

如果您希望按列排序，第一种方法是将其放在multicols环境中：

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{subfig,multicol}
\begin{document}
\begin{figure}[htbp]
\begin{multicols}{3}
\noindent
\subfloat[configuration 1]{\includegraphics[width=.9\linewidth]{8}}\par 
\subfloat[configuration 2]{\includegraphics[width=.9\linewidth]{9}}\newpage 
\subfloat[configuration 3]{\includegraphics[width=.9\linewidth]{7}}\par 
\subfloat[configuration 4]{\includegraphics[width=.9\linewidth]{8}}\newpage
\subfloat[configuration 5]{\includegraphics[width=.9\linewidth]{9}}\par
\subfloat[configuration 6]{\includegraphics[width=.9\linewidth]{8}}
\end{multicols}
\caption{Here goes the caption.}
\label{fig6}
\end{figure}
\end{document}

Answer 2

另一种方法是使用三个tabular环境，每个环境一列。

代码：

\documentclass{article}
\usepackage[margin=1cm]{geometry}
\usepackage[demo]{graphicx}
\usepackage{subfig}

\begin{document}

\begin{figure}[!htbp]
\centering
\begin{tabular}{l}
\subfloat[configuration 1]{\includegraphics[width=0.3\linewidth]{8}} \\
\subfloat[configuration 2]{\includegraphics[width=0.3\linewidth]{9}}
\end{tabular}
\begin{tabular}{l}
\subfloat[configuration 3]{\includegraphics[width=0.3\linewidth]{7}} \\
\subfloat[configuration 4]{\includegraphics[width=0.3\linewidth]{8}} 
\end{tabular}
\begin{tabular}{l}
\subfloat[configuration 5]{\includegraphics[width=0.3\linewidth]{9}} \\
\subfloat[configuration 6]{\includegraphics[width=0.3\linewidth]{8}}
\end{tabular}
\caption{Here goes the caption.}
\label{fig6}
\end{figure}
\end{document}