为什么 Latex 中表格右边框缺少新行

Question

我正在使用下面的代码，

\begin{table}
\caption{RFID Operating Frequency}
\label{tab:2_3}
\centering
  \begin{tabular}{ |p{3cm}|p{2cm}|p{2cm}|p{3cm}| }
    \hline
    \Centering \textbf{Frequency Band} & \Centering  \textbf{Read Distance} & \Centering  \textbf{Data Speed} & \Centering  \textbf{Application}  \\ \hline
        \Centering Low Frequency \\ (120–150 kHz) & Hours & Days & Years \\ \hline
        \Centering High Frequency \\ (13.56 MHz) & Very complex & Complex & Simple \\ \hline
        \Centering Ultra-High Frequency \\ (868-928 MHz) & QPSK & FSK, GMSK & BPSK, O- QPSK \\ \hline
        \Centering Microwave \\ (2.45-5.8 GHz) & Microwave & Microwave & Microwave \\ \hline 

     \end{tabular}
  \end{table}

获取输出结果，其中某些新行的表格边距在右侧缺失，

我如何才能修复表格边距以适应新行？

Answer 1

在...的帮助下makecell：

\documentclass{article}
\usepackage{array}
\usepackage{makecell}
\renewcommand{\theadfont}{\normalsize\bfseries}
\begin{document}

\begin{table}
\caption{RFID Operating Frequency}
\label{tab:2_3}
\setlength{\tabcolsep}{5pt}
\centering
  \begin{tabular}{ |l|l|l|l| }
    \hline
     \thead{Frequency Band} &  \thead{Read Distance} &   \thead{Data Speed} &  \thead{Application}  \\ \hline
         \makecell[ct]{Low Frequency \\ (120–150 kHz)} & Hours & Days & Years \\ \hline
         \makecell[ct]{High Frequency \\  (13.56 MHz)} & Very complex & Complex & Simple \\ \hline
         \makecell[ct]{Ultra-High Frequency \\ (868-928 MHz)} & QPSK & FSK, GMSK & BPSK, O- QPSK \\ \hline
         \makecell[ct]{Microwave\\  (2.45-5.8 GHz)} & Microwave & Microwave & Microwave \\ \hline 

     \end{tabular}
  \end{table}

  \end{document}

Answer 2

我将按如下方式重新设计您的表格：

即：我根本不会使用垂直线！

在 MWE 中使用包caption（用于表格标题）、booktabs用于表格中的水平规则）、makecell用于单元格格式化的命令和\thead用于在行中插入额外垂直空间的宏：makecell\makegapredcell

\documentclass{article}
\usepackage[skip=1ex, font=small, labelfont=bf]{caption}
\usepackage{booktabs, makecell}
\renewcommand\theadfont{\small\bfseries}
\renewcommand\theadgape{}
\usepackage{siunitx}

\begin{document}
    \begin{table}[ht]
\caption{RFID Operating Frequency}
\label{tab:2_3}
    \centering
    \setcellgapes{3pt}
    \makegapedcells
  \begin{tabular}{@{} c *{3}{l} @{} }
    \toprule
\thead[l]{Frequency Band} & \thead[l]{Read Distance} & \thead[l]{Data Speed} & \thead[l]{Application}  \\
    \midrule
\makecell{Low Frequency \\ (\SIrange{120}{150}{kHz})}
    & Hours         & Days      & Years                 \\
\makecell{High Frequency \\ (\SI{13.56}{MHz})}
    & Very complex  & Complex   & Simple               \\
\makecell{Ultra-High Frequency \\ (\SIrange{868}{928}{MHz})}
    & QPSK          & FSK, GMSK & BPSK, O- QPSK         \\
\makecell{Microwave \\ (\SIrange{2.45}{5.8}{GHz})}
    & Microwave     & Microwave & Microwave             \\
    \bottomrule
     \end{tabular}
  \end{table}
\end{document}

Answer 3

如果使用代替标准的{NiceTabular}，即使在不完整的行中，垂直规则也不会被破坏。nicematrix{tabular}

\documentclass{article}
\usepackage{nicematrix}
\usepackage{ragged2e}

\begin{document}

\begin{table}
\caption{RFID Operating Frequency}
\label{tab:2_3}
\centering
  \begin{NiceTabular}{ |p{3cm}|p{2cm}|p{2cm}|p{3cm}| }
    \hline
    \Centering \textbf{Frequency Band} & \Centering  \textbf{Read Distance} & \Centering  \textbf{Data Speed} & \Centering  \textbf{Application}  \\ \hline
        \Centering Low Frequency \\ (120–150 kHz) & Hours & Days & Years \\ \hline
        \Centering High Frequency \\ (13.56 MHz) & Very complex & Complex & Simple \\ \hline
        \Centering Ultra-High Frequency \\ (868-928 MHz) & QPSK & FSK, GMSK & BPSK, O- QPSK \\ \hline
        \Centering Microwave \\ (2.45-5.8 GHz) & Microwave & Microwave & Microwave \\ \hline 

   \end{NiceTabular}
\end{table}

\end{document}

然而，OP期望的输出可能更像下面的代码（使用 的工具nicematrix）。

\documentclass{article}
\usepackage{caption}
\usepackage{nicematrix}

\begin{document}

\begin{table}
\caption{RFID Operating Frequency}
\label{tab:2_3}
\centering
  \begin{NiceTabular}{clll}[hvlines,cell-space-limits=2pt]
        \RowStyle{\bfseries}
        Frequency Band & \Block[c]{}{Read Distance} & \Block[c]{}{Data Speed} & \Block[c]{}{Application}  \\ 
        \Block{}{Low Frequency \\ (120–150 kHz)} & Hours & Days & Years \\ 
        \Block{}{High Frequency \\ (13.56 MHz)} & Very complex & Complex & Simple \\ 
        \Block{}{Ultra-High Frequency \\ (868-928 MHz)} & QPSK & FSK, GMSK & BPSK, O- QPSK \\ 
        \Block{}{Microwave \\ (2.45-5.8 GHz)} & Microwave & Microwave & Microwave \\  
   \end{NiceTabular}
\end{table}

\end{document}