考虑：
\documentclass{article}
\usepackage{tabularray}
\UseTblrLibrary{booktabs, siunitx}
\begin{document}
\begin{table}
\begin{center}
\begin{tblr}{colspec = {Q[c, mode=math]*{4}{Q[c, si={table-format=1.2}]}},
row{1} = {guard, mode=text},
row{2-Z} = {rowsep=0pt},
row{odd[3-X]}={belowsep=0.5ex},
row{Z} = {guard}
}
\toprule
Parameters
& \SetCell[c=4]{c} Numerical values
& & & \\
\toprule
a & 0.8 &0.8 & 0.8 & 0.8 \\
aa & 0.1 & 0.1 & 0.1 & 0.1 \\
aa & 0.61 & 0. 68 & 0.52 & 0.79 \\
a_I & 0.53 & 0.74 & 0.69 & 0.81 \\
a & 0.29 & 0.22 & 0.32 & 0.2 \\
a & 0.27 & 0.21 & 0.19 & 0.17 \\
a & 0.52 & 0.67 & 0.42 & 0.3 \\
a & 0.29 & 0.44 & 0.23 & 0.49 \\
a &0.15 & 0.12 & 0.15 & 0.11 \\
a &0.21 & 0.14 & 0.19 & 0.13 \\
a &0.53 & 0.47 & 0.61 & 0.51 \\
a & 0.11 & 0.13 & 0.1 & 0.13 \\
a &0.14 & 0.14 & 0.04 & 0.03 \\
a &0.16 & 0.16 & 0.07 & 0.02 \\
a &0.15 & 0.15 & 0.06 & 0.04 \\
a &0.17 & 0.17 & 0.05 & 0.05 \\
a &0.2 & 0.2 & 0.27 & 0.24 \\
a &0.23 & 0.23 & 0.29 & 0.23 \\
a &0.15 & 0.15 & 0.24 & 0.21 \\
a &0.14 & 0.14 & 0.22 & 0.22 \\
\midrule[0.8pt]
& Figure \textcolor{black}{4.1}
& Figure \textcolor{black}{4.2}
& Figure \textcolor{black}{4.3}
& Figure \textcolor{black}{4.4} \\
\cmidrule[0.8pt]{2-5}
\end{tblr}
\end{center}
\caption{Parameter values }
\label{aa}
\end{table}
\end{document}
我试过：
\documentclass{article}
\usepackage{tabularray}
\UseTblrLibrary{booktabs, siunitx}
\begin{document}
\begin{table}
\begin{center}
\begin{tblr}{colspec = {Q[c, mode=math]*{3}{Q[c, si={table-format=1.2}]}},
row{1} = {guard, mode=text},
row{2-Z} = {rowsep=0pt},
row{odd[3-X]}={belowsep=0.5ex},
row{Z} = {guard}
}
\toprule
Parameters
& \SetCell[c=2]{c} Numerical values
& & \\
\toprule
a & 0.8 &0.8 \\
a & 0.1 & 0.1 \\
a & 0.67 & 0. 77 \\
a & 0.15 & 0.12 \\
a & 0.12 & 0.11 \\
a & 0.1 & 0.1 \\
a & 0.65 & 0.52 \\
a &0.23 & 0.19 \\
a &0.6 & 0.6 \\
a &0.4 & 0.4 \\
a &0.7 & 0.7 \\
a &0.2 & 0.2 \\
a &0.04 & 0.04 \\
a &0.23 & 0.23 \\
a &0.19 & 0.19 \\
a &0.11 & 0.11 \\
a &0.12 & 0.12 \\
\midrule[0.8pt]
& Figure \textcolor{black}{7.1}
& Figure \textcolor{black}{7.2} \\
\cmidrule[0.8pt]{2-5}
\end{tblr}
\end{center}
\caption{Parameter values . }
\label{Table7.1}
\end{table}
\end{document}
我们如何删除最后两列，同时保持格式和中心标题不变？我的尝试已附上，但我觉得它有点不对劲，例如“数值”没有集中。