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选定单元格内的水平对齐

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选定单元格内的水平对齐

我正在处理下表：

   \documentclass{article}
    \usepackage{mathtools}
    \usepackage{array} 
    \usepackage{booktabs}


\begin{document}   

 \begin{table}[htbp]
        \caption{Test Cases} % title of Table
        \centering % used for centering table
        \addtolength{\leftskip} {-2cm}
        \addtolength{\rightskip}{-2cm}
        \begin{tabular}{l l c c c | c >{\centering\arraybackslash}p{1.5cm}} % columns type and number    
        \hline\hline %inserts double horizontal lines
        Parameters & &NoCross\#1 & NoCross\#2 & NoCross\#3 & Cross\#1 & Cross\#2 \\ [0.5ex] % inserts table
        %heading
        \hline % inserts single horizontal line
        mass &[kg]               & 1500     & 1500      &1500           & 1500        &1500\\ % inserting body of the table                                  
        thrust &[N]              & 5000     & 5000      &10000          & 5000        &10000\\
        altitude &[km]           & 15       & 10        &15             & 15          &15   \\
        n2(k): $x_f-x_0$ &       & 24.8671 & 25.0002    &14.0379        & 24.8678    &14.0379 13.9663 13.8099\\
        n1(k): $x_f-x_0$ &       & 24.8671 & 25.0002    &14.0379        & 24.8678    &/\\
        n1(k-2): $x_f-x_0$ - 30&       & 26.8671 & 27.0002    &16.0379        & 26.8678    &/\\
        n1(k-4): $x_f-x_0$ - 60 &      & 28.8671 & 29.0002  & /               & 28.8678    &/\\ % [1ex] adds vertical space
        n1(k+1.5): $x_f-x_0$ + 22.5 &     & /        & /         &12.5379        & /           &/\\
        diversion j &        & /        & /         & /              & $\pm$1.5    &$\pm$1.5/3/4.5\\
        \hline %inserts single line
        \end{tabular}
        \label{table:testcases} % is used to refer this table in the text
        \end{table}

\end{document}

我想水平对齐第一列（第 4 行到第 8 行）上的表达式。具体来说，我想让所有表达式都对齐x_f-x_0。我该怎么做？

答案1

以下是使用两列的三个不同版本，用于表达式，例如n2(k): $x_f-x_0$。我还包含一个版本，它适合文本宽度，而不允许表格突出到左右边距，同时还使用booktabs-style 水平线且无垂直线：

在此处输入图片描述

\documentclass{article}
\usepackage{mathtools}
\usepackage{array} 
\usepackage{booktabs}
\usepackage{makecell}

\begin{document}   

 \begin{table}[htbp]
        \caption{Test Cases} % title of Table
        \centering % used for centering table
        \addtolength{\leftskip} {-2cm}
        \addtolength{\rightskip}{-2cm}
        \begin{tabular}{l@{\;}l l c c c | c >{\centering\arraybackslash}p{1.5cm}} % columns type and number    
        \hline\hline %inserts double horizontal lines
        \multicolumn{2}{l}{Parameters}& &NoCross\#1 & NoCross\#2 & NoCross\#3 & Cross\#1 & Cross\#2 \\ [0.5ex] % inserts table
        %heading
        \hline % inserts single horizontal line
        \multicolumn{2}{l}{mass} &[kg]               & 1500     & 1500      &1500           & 1500        &1500\\ % inserting body of the table                                  
        \multicolumn{2}{l}{thrust} &[N]              & 5000     & 5000      &10000          & 5000        &10000\\
        \multicolumn{2}{l}{altitude} &[km]           & 15       & 10        &15             & 15          &15   \\
        n2(k):& $x_f-x_0$ &       & 24.8671 & 25.0002    &14.0379        & 24.8678    &14.0379 13.9663 13.8099\\
        n1(k):& $x_f-x_0$ &       & 24.8671 & 25.0002    &14.0379        & 24.8678    &/\\
        n1(k-2):& $x_f-x_0 - 30$&       & 26.8671 & 27.0002    &16.0379        & 26.8678    &/\\
        n1(k-4):& $x_f-x_0 - 60$ &      & 28.8671 & 29.0002  & /               & 28.8678    &/\\ % [1ex] adds vertical space
        n1(k+1.5):& $x_f-x_0 + 22.5$ &     & /        & /         &12.5379        & /           &/\\
        \multicolumn{2}{l}{diversion j} &        & /        & /         & /              & $\pm$1.5    &$\pm$1.5/3/4.5\\
        \hline %inserts single line
        \end{tabular}
        \label{table:testcases} % is used to refer this table in the text
        \end{table}
        
 \begin{table}[htbp]
        \caption{Test Cases} % title of Table
        \centering % used for centering table
        \addtolength{\leftskip} {-2cm}
        \addtolength{\rightskip}{-2cm}
        \begin{tabular}{r@{\;}l l c c c | c >{\centering\arraybackslash}p{1.5cm}} % columns type and number    
        \hline\hline %inserts double horizontal lines
        \multicolumn{2}{l}{Parameters}& &NoCross\#1 & NoCross\#2 & NoCross\#3 & Cross\#1 & Cross\#2 \\ [0.5ex] % inserts table
        %heading
        \hline % inserts single horizontal line
        \multicolumn{2}{c}{mass} &[kg]               & 1500     & 1500      &1500           & 1500        &1500\\ % inserting body of the table                                  
        \multicolumn{2}{c}{thrust} &[N]              & 5000     & 5000      &10000          & 5000        &10000\\
        \multicolumn{2}{c}{altitude} &[km]           & 15       & 10        &15             & 15          &15   \\
        n2(k):& $x_f-x_0$ &       & 24.8671 & 25.0002    &14.0379        & 24.8678    &14.0379 13.9663 13.8099\\
        n1(k):& $x_f-x_0$ &       & 24.8671 & 25.0002    &14.0379        & 24.8678    &/\\
        n1(k-2):& $x_f-x_0 - 30$&       & 26.8671 & 27.0002    &16.0379        & 26.8678    &/\\
        n1(k-4):& $x_f-x_0 - 60$ &      & 28.8671 & 29.0002  & /               & 28.8678    &/\\ % [1ex] adds vertical space
        n1(k+1.5):& $x_f-x_0 + 22.5$ &     & /        & /         &12.5379        & /           &/\\
        \multicolumn{2}{c}{diversion j} &        & /        & /         & /              & $\pm$1.5    &$\pm$1.5/3/4.5\\
        \hline %inserts single line
        \end{tabular}
        \label{table:testcases} % is used to refer this table in the text
        \end{table}

 \begin{table}[htbp]
        \caption{Test Cases} % title of Table
        \centering
        \setlength{\tabcolsep}{4pt}
        \begin{tabular}{l@{\;}l c c c  c c}   
        \toprule
        \multicolumn{2}{l}{Parameters}    & \multicolumn{3}{c}{NoCross} & \multicolumn{2}{c}{Cross} \\
        \cmidrule(r){3-5} \cmidrule(l){6-7} 
                                        & & \#1        & \#2        & \#3        & \#1      & \#2          \\ 
        \midrule 
        \multicolumn{2}{l}{mass [kg]}     & 1500       & 1500       & 1500       & 1500     & 1500          \\
        \multicolumn{2}{l}{thrust [N]}    & 5000       & 5000       & 10000      & 5000     & 10000         \\
        \multicolumn{2}{l}{altitude [km]} & 15         & 10         & 15         & 15       & 15            \\
        n2(k):& $x_f-x_0$                 & 24.8671    & 25.0002    & 14.0379    & 24.8678  & \makecell[t]{14.0379\\ 13.9663\\ 13.8099}\\
        n1(k):& $x_f-x_0$                 & 24.8671    & 25.0002    & 14.0379    & 24.8678  &               \\
        n1(k-2):& $x_f-x_0 - 30$          & 26.8671    & 27.0002    & 16.0379    & 26.8678  &               \\
        n1(k-4):& $x_f-x_0 - 60$          & 28.8671    & 29.0002    &            & 28.8678  &               \\
        n1(k+1.5):& $x_f-x_0 + 22.5$      &            &            & 12.5379    &          &               \\
        \multicolumn{2}{l}{diversion j}   &            &            &            & $\pm$1.5 & $\pm$1.5/3/4.5\\
        \bottomrule
        \end{tabular}
        \label{table:testcases}
        \end{table}
\end{document}

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