tabularx 单元格中的水平居中

Question

这是我当前的代码：

\newcolumntype{b}{X}
\newcolumntype{m}{>{\hsize=.5\hsize}X}
\newcolumntype{s}{>{\hsize=.2\hsize}X}
\begin{table}
    \caption{Summary of the Most Common BCI Control Signals}
    \centering
    \begin{tabularx}{\textwidth}{sbmmsbb}
        \hline
        \textbf{Name} & \textbf{Phenomena} & \textbf{Type} & \textbf{No. commands} & \textbf{Training} & \textbf{Advantages} & \textbf{Disadvantages} \vspace{4pt}\\
        \hline

        SSVEP & Oscillatory signals at the same frequency than a flickering visual stimuli & Exogenous & High & No & Very high transmission rates \newline No training required & Possible visual fatigue and epileptic seizures \newline No. commands limited by the standardized refreshing rate of LCD screens \newline Requires gaze control\vspace{4pt}\\
        \hline
    \end{tabularx}
\end{table}

我想将行水平居中，以便得到如下效果：

有任何想法吗？

编辑：现在我可以使用 将行居中\renewcommand\tabularxcolumn[1]{m{#1}}，但无法使用 修改宽度百分比，\newcolumntype{m}{>{\hsize=.5\hsize}X}因为它无法编译。有没有同时实现两者的解决方案？

Answer 1

做不是 使用预定义的列类型 b 和 m：

[...]
\usepackage{tabularx}
\renewcommand\tabularxcolumn[1]{m{#1}}
\newcolumntype{B}{X}
\newcolumntype{M}{>{\hsize=.5\hsize}X}
\newcolumntype{s}{>{\hsize=.2\hsize}X}

\begin{document}

\begin{table}
\caption{Summary of the Most Common BCI Control Signals}
\begin{tabularx}{\textwidth}{sBMMsBB}
[...]

Answer 2

您对系数的计算是错误的：系数的总和必须等于总列数X。例如，如果您想要有 3 个 X 列，其中 1 个是其他两个的一半宽，那么您必须有前言

\begin{tabularx{>{\hsize=1.2\hsize}X>{\hsize=1.2\hsize}X>{\hsize=0.6\hsize}X}

无论如何，我建议对三个较大的单元格使用标准 X 列，对其他四个单元格使用 c 列，并结合使用 命令\thead，makecell这样可以实现换行和单元格的通用格式：

\documentclass{article}
\usepackage[showframe, hmargin=2cm]{geometry}
\usepackage{tabularx, ragged2e, caption, makecell}
\renewcommand{\theadfont}{\normalsize\bfseries}
\renewcommand{\tabularxcolumn}[1]{>{\RaggedRight}m{#1}}
\setlength{\extrarowheight}{2pt}

\begin{document}

\begin{table}[!htb]
    \caption{Summary of the Most Common BCI Control Signals}
    \centering\setlength{\tabcolsep}{3pt}
    \begin{tabularx}{\textwidth}{cXcccXX}
        \hline
        \thead{Name} & \thead{Phenomena} & \thead{Type} & \thead{No. \\commands} & \thead{Training} & \thead{Advantages} & \thead{Disadvantages} \\
        \hline
        SSVEP & Oscillatory signals at the same frequency than a flickering visual stimuli & Exogenous & High & No & Very high transmission rates \newline No training required & Possible visual fatigue and epileptic seizures \newline No. commands limited by the standardized refreshing rate of LCD screens \newline Requires gaze control\vspace{4pt}\\
        \hline
    \end{tabularx}
\end{table}

\end{document}