我试图将表格中的值 4.9731 涂成蓝色，但目前没有任何效果。图片显示了表格供您参考。
\begin{table}[h]
\begin{tabular}{cc|cccccc|}
\cline{3-8}
\multicolumn{2}{c|}{} & \multicolumn{6}{c|}{\textbf{Number of Hidden Units}} \\
\cline{3-8}
\multicolumn{2}{c|}{} & \multicolumn{3}{c|}{\textbf{25}} & \multicolumn{3}{c|}{\textbf{50}} \\ \cline{3-8}
\multicolumn{2}{c|}{} & \multicolumn{3}{c|}{\textbf{Lookback Steps}} & \multicolumn{3}{c|}{\textbf{Lookback Steps}} \\ \cline{3-8}
\multicolumn{2}{c|}{\multirow{}{}{}} & \multicolumn{1}{c|}{\textbf{0}} & \multicolumn{1}{c|}{\textbf{2}} & \multicolumn{1}{c|}{\textbf{5}} & \multicolumn{1}{c|}{\textbf{0}} & \multicolumn{1}{c|}{\textbf{2}} & \textbf{5} \\ \hline
\multicolumn{1}{|c|}{\multirow{}{}{}} & {\textbf{0.5}} & \multicolumn{1}{c|}{5.0170} & \multicolumn{1}{c|}{5.0351} & \multicolumn{1}{c|}{5.0180} & \multicolumn{1}{c|}{4.9731} & \multicolumn{1}{c|}{5.0292} & {5.0211} \\ \cline{2-8}
\multicolumn{1}{|c|}{\textbf{Learning Rate}} & \textbf{0.1} & \multicolumn{1}{c|}{5.2190} & \multicolumn{1}{c|}{5.2145} & \multicolumn{1}{c|}{5.2146} & \multicolumn{1}{c|}{5.1329} & \multicolumn{1}{c|}{5.1366} & 5.1368 \\ \cline{2-8}
\multicolumn{1}{|c|}{} & \textbf{0.05} & \multicolumn{1}{c|}{5.4077} & \multicolumn{1}{c|}{5.4038} & \multicolumn{1}{c|}{5.4038} & \multicolumn{1}{c|}{5.3130} & \multicolumn{1}{c|}{5.3142} & 5.3142 \\ \hline
\end{tabular}
\caption{All possible combinations of parameters settings using different learning rates, number of hidden units and lookback steps in truncated backpropagation}
\label{table:table1}
\end{table}
答案1
除了遵循@Marijn的建议——加载包xcolor并更改4.9731为\textcolor{blue}{4.9731}——您还应该大大简化表格的LaTeX代码，主要是通过摆脱大量不必要的\multicolumn{1}包装器。旁白：您是否使用tablegenerators.com（或一些类似的网站）来生成基本的LaTeX代码？如果是，请同时听取以下建议：不要再这样做了。:-)
\documentclass{article}
\usepackage{array} % for '\extrarowheight' macro
\usepackage{xcolor} % for '\textcolor' macro
% 2 handy shortcut macros:
\newcommand\mcii{\multicolumn{2}{l|}{}}
\newcommand\mciii[1]{\multicolumn{3}{c|}{\textbf{#1}}}
\begin{document}
\begin{table}[h]
\setlength\tabcolsep{5pt} % default value: 6pt
\setlength\extrarowheight{2pt} % for a less-cramped "look"
\centering
\begin{tabular}{|l|l|*{6}{c|}}
\cline{3-8}
\mcii & \multicolumn{6}{c|}{\textbf{Number of Hidden Units}} \\
\cline{3-8}
\mcii & \mciii{25} & \mciii{50} \\
\cline{3-8}
\mcii & \mciii{Lookback Steps} & \mciii{Lookback Steps} \\
\cline{3-8}
\mcii & \textbf{0} & \textbf{2} & \textbf{5}
& \textbf{0} & \textbf{2} & \textbf{5} \\
\hline
& \textbf{0.5} & 5.0170 & 5.0351 & 5.0180
& \textcolor{blue}{4.9731} & 5.0292 & 5.0211 \\
\cline{2-8}
\textbf{Learning Rate}
& \textbf{0.1} & 5.2190 & 5.2145 & 5.2146
& 5.1329 & 5.1366 & 5.1368 \\
\cline{2-8}
& \textbf{0.05} & 5.4077 & 5.4038 & 5.4038
& 5.3130 & 5.3142 & 5.3142 \\
\hline
\end{tabular}
\caption{All possible combinations of parameters settings using different learning rates, number of hidden units and lookback steps in truncated backpropagation}
\label{table:table1}
\end{table}
\end{document}
答案2
供参考，这里有一种使用 创建表格{NiceTabular}的方法nicematrix（但是，我建议本着 的精神进行设计booktabs）。
\documentclass{article}
\usepackage{geometry}
\usepackage{nicematrix}
\begin{document}
\begin{table}[h]
\begin{NiceTabular}{>{\bfseries}c>{\bfseries}ccccccc}% <- the % is mandatory here
[
hvlines,
corners,
caption = { All possible combinations of parameters settings using different learning rates,
number of hidden units and lookback steps in truncated backpropagation }
]
\RowStyle[nb-rows=4]{\bfseries}
& & \Block{1-6}{Number Hidden Units} \\
& & \Block{1-3}{25} &&& \Block{1-3}{50} \\
& & \Block{1-3}{Lookback Steps} &&& \Block{1-3}{Lookback Steps} \\
& & 0 & 2 & 5 & 0 & 2 & 5 \\
\Block{3-1}{} & 0.5 & 5.0170 & 5.0351 & 5.0180 & \color{blue}4.9731 & 5.0292 & 5.0211 \\
Learning Rate & 0.1 & 5.2190 & 5.2145 & 5.2146 & 5.1329 & 5.1366 & 5.1368 \\
& 0.05 & 5.4077 & 5.4038 & 5.4038 & 5.3130 & 5.3142 & 5.3142 \\
\end{NiceTabular}
\label{table:table1}
\end{table}
\end{document}
您需要多次编译。
