EADST

LaTeX Table Diagbox, Multicolumn, and Multirow

\usepackage{tabu}
\usepackage{diagbox}
\usepackage{multirow}

\begin{table*}[htbp] 
    \caption{Result.} 
    \label{tab:result}
    \begin{center}
        \begin{tabular}{|l|l|l|l|l|l|}
            \hline
            \multicolumn{2}{|l|}{\diagbox{Dataset}{Model}} & \rule[-1ex]{0pt}{3.5ex}  VGG-16 & GoogLeNet & ResNet-50\\
            \hline
            \rule[-1ex]{0pt}{3.5ex} \multirow{4}*{UCM}  & train set & 100 & 88.75 & 90.74  \\
            \cline{2-5}
            \rule[-1ex]{0pt}{3.5ex}   & val set & 90.00 & 92.35 & 93.70  \\
            \cline{2-5}
            \rule[-1ex]{0pt}{3.5ex}   & test set & 90.97 & 92.17 & 93.26  \\
            \cline{2-5}
            \rule[-1ex]{0pt}{3.5ex}   & overall & 97.02 & 97.69 & 98.41  \\
            \hline
        \end{tabular}
    \end{center}
\end{table*}