它在表格第一列下面添加了一行。为什么？

Question

\begin{table*}
    \centering
    \caption{Eigenvalues of Study System with and without SSSC}
    \begin{tabular}{c|c|c|c|c}
        \toprule 
        \multirow{3}{*}{Mode}&\multicolumn{4}{c}{75\% Compensation level}\\
        \cmidrule{2-5}
        &\multicolumn{2}{c}{case:1(without SSSC)} &\multicolumn{2}{|c}{case:2(with SSSC)} \\
        \cmidrule{2-5}
        &$\sigma\pm j\omega$& $\zeta$ &$\sigma\pm j\omega$& $\zeta$  \\
        \midrule 
        Supersynnchronous&-9.5903$\pm$629.17i&0.01524 &-12.344$\pm$556.39i&0.02218\\
        Subsynnchronous&1.6034$\pm$123.7   &-0.01296&-9.0587$\pm$137.23i&0.06586\\ 
        Shaft    &-0.4911$\pm$6.1496i&0.07962  &-0.48842$\pm$6.1493i&0.07917\\
        Torsional &-85.88 $\pm$38.471i&0.91261  &-85.883$\pm$37.936i&0.91474\\
        Electromechanical&-11.602$\pm$91.825i&0.12535  &-9.6224$\pm$94.729i&0.10106\\ 
        \midrule
        \multirow{7}{*}{Other}&-2416.6$\pm$1271.4i&0.88511  &-2421.1$\pm$1252.1i&0.88825\\
        &      0$\pm$0i     &  -      &-2670.3            &1      \\ 
        &   0$\pm$0i        &   -     &-110.25            &1      \\
        &      -0.12579     &    1    &-0.15132           &1      \\
        &     -0.0035219    &   1     &-0.0034435         &1      \\
        &                   &         &0$\pm$0i           &-      \\ 
        &                   &         &0$\pm$0i           &-      \\                  
        \bottomrule 
        \label{comparison75}
    \end{tabular}
\end{table*} 

Answer 1

问题是该\label命令位于 内tabular。如果您将其放在 的范围内，table则多余的行就会消失。

我不完全确定为什么会出现这个确切的问题，可能是该\label命令被视为打印第一列分隔线的额外行的开始。

梅威瑟：

\documentclass{article}
\usepackage{booktabs}
\usepackage{multirow}
\begin{document}
\begin{table*}
    \centering
    \caption{Eigenvalues of Study System with and without SSSC}
    \label{comparison75}
    \begin{tabular}{c|c|c|c|c}
        \toprule 
        \multirow{3}{*}{Mode}&\multicolumn{4}{c}{75\% Compensation level}\\
        \cmidrule{2-5}
        &\multicolumn{2}{c}{case:1(without SSSC)} &\multicolumn{2}{|c}{case:2(with SSSC)} \\
        \cmidrule{2-5}
        &$\sigma\pm j\omega$& $\zeta$ &$\sigma\pm j\omega$& $\zeta$  \\
        \midrule 
        Supersynnchronous&-9.5903$\pm$629.17i&0.01524 &-12.344$\pm$556.39i&0.02218\\
        Subsynnchronous&1.6034$\pm$123.7   &-0.01296&-9.0587$\pm$137.23i&0.06586\\ 
        Shaft    &-0.4911$\pm$6.1496i&0.07962  &-0.48842$\pm$6.1493i&0.07917\\
        Torsional &-85.88 $\pm$38.471i&0.91261  &-85.883$\pm$37.936i&0.91474\\
        Electromechanical&-11.602$\pm$91.825i&0.12535  &-9.6224$\pm$94.729i&0.10106\\ 
        \midrule
        \multirow{7}{*}{Other}&-2416.6$\pm$1271.4i&0.88511  &-2421.1$\pm$1252.1i&0.88825\\
        &      0$\pm$0i     &  -      &-2670.3            &1      \\ 
        &   0$\pm$0i        &   -     &-110.25            &1      \\
        &      -0.12579     &    1    &-0.15132           &1      \\
        &     -0.0035219    &   1     &-0.0034435         &1      \\
        &                   &         &0$\pm$0i           &-      \\ 
        &                   &         &0$\pm$0i           &-      \\                  
        \bottomrule 
    \end{tabular}
\end{table*} 

\end{document}

结果：