前三行出现了多余的空白，这是我不想要的。如何删除这些多余的空白？
\begin{table}[h]
\begin{center}
\begin{tabular}{l c c c c c c c}
\hline \hline
\multicolumn{8}{l}{} \\
Cases & Left & Right & Below & Above & Numbers & Sum & Framework \\
\hline\hline
\multicolumn{8}{l}{} \\ Case I & \ding{55}& \checkmark& 0/$\pi$& 0 &0 & 0.1408-0.1496 & 0.057-0.059 \\
\hline
\multicolumn{8}{l}{} \\ Case II & \ding{55} & \checkmark& 0/$\pi$ &0-2$\pi$ & 0 & 0.1408-0.1496& 0.019-0.054 \\
\hline
\multirow{2}{*}{Case III} & \multirow{2}{*}{\checkmark} & \multirow{2}{*}{\ding{55}} & 0-0.78 & \multirow{2}{*}{-2.362$-$1.26} & \multirow{2}{*}{0.61-1.20} & \multirow{2}{*}{0.0773-0.1231} & \multirow{2}{*}{0.0059-0.026} \\
& & & 3.14-3.66 & & & & \\ \hline
\multirow{2}{*}{Case IV} & \multirow{2}{*}{\checkmark} & \multirow{2}{*}{\ding{55}} &0-0.78 & \multirow{2}{*}{0.60-1.84} & \multirow{2}{*}{0.61-1.20} & \multirow{2}{*}{0.0773-0.1231} & \multirow{2}{*}{0.013-0.025} \\
& & & 3.14-3.66 & & & & \\
\hline
\multirow{2}{*}{General Case} & \multirow{2}{*}{\checkmark} & \multirow{2}{*}{\ding{55}} &-1.5-0.6 & \multirow{2}{*}{-3-3} & \multirow{2}{*}{-2.85-1.13} & \multirow{2}{*}{0.06-1.12} & \multirow{2}{*}{0.001-0.03} \\
& & & 1.38-1.57 & & & & \\
\hline
\multirow{2}{*}{General Case} & \multirow{2}{*}{\ding{55}} & \multirow{2}{*}{\checkmark} & -1.5-0.6 & \multirow{2}{*}{-3-3} & -1.5$-$0.01 & \multirow{2}{*}{0.115-0.15} & \multirow{2}{*}{0.016-0.06} \\
& & & 0.8-1.56 & & 1.33-1.7& & \\
\hline
\end{tabular}
\caption{Summary of the analysis.}\label{tab:summary}
\end{center}
\end{table}
答案1
我想向您展示一个解决方案tabularray：
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\usepackage{geometry}
\usepackage{tabularray}
\usepackage{pifont}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
\begin{table}[h]\small\centering% see https://tex.stackexchange.com/questions/23650/when-should-we-use-begincenter-instead-of-centering?rq=1
\begin{tblr}{
colspec={lcc*5{rcl}},
cell{2-Z}{4-Z}={mode=math},
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cell{3}{5,11}={cmd=\makebox[0pt]},
cell{4-Z}{5}={preto=\text{--}},
cell{3,4,6,8,10}{8}={preto=\text{--}},
cell{4,6,8,10,11}{11}={preto=\text{--}},
cell{2-4,6,8,10}{14,17}={preto=\text{--}},
cell{4,6,8,10}{1}={r=2}{l},
cell{4,6,8,10}{7,13,16}={r=2}{r},
cell{4,6,8,10}{2,3,8,14,17}={r=2}{c},
cell{4,6,8,10}{9,15,18}={r=2}{l},
cell{4,6,8}{10}={r=2}{r},
cell{4,6,8}{11}={r=2}{c},
cell{4,6,8}{12}={r=2}{l},
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}
Cases & Left & Right && Below &&& Above &&& Numbers &&& Sum &&& Framework & \\
Case I & \ding{55}& \checkmark&& $0/\pi$&&& $0$ &&&$0$ && 0.1408&&0.1496 & 0.057&&0.059 \\
Case II & \ding{55} & \checkmark&& $0/\pi$ && 0&&2\pi && $0$&& 0.1408&&0.1496 & 0.019&&0.054 \\
Case III & \checkmark & \ding{55} & 0&&0.78 & -2.362&&1.26 & 0.61&&1.20 & 0.0773&&0.1231 & 0.0059&&0.026 \\
& & & 3.14&&3.66 & & & & &&&&&&&&\\
Case IV & \checkmark & \ding{55} & 0&&0.78 & 0.60&&1.84 & 0.61&&1.20 & 0.0773&&0.1231 & 0.013&&0.025 \\
& & & 3.14&&3.66 & & & & &&&&&&&&\\
General Case & \checkmark & \ding{55} & -1.5&&0.6 & -3&&3 & -2.85&&1.13 & 0.06&&1.12 & 0.001&&0.03 \\
& & & 1.38&&1.57 & & & & &&&&&&&&\\
General Case & \ding{55} & \checkmark & -1.5&&0.6 & -3&&3 & -1.5&&0.01 & 0.115&&0.15 & 0.016&&0.06 \\
& & & 0.8 &&1.56 & &&& 1.33 && 1.7 &&&&&&\\
\end{tblr}
\caption{Summary of the analysis.}\label{tab:summary}
\end{table}
\end{document}
