如何修改LaTeX表格最后一行，将多列合并为单列展示统计数据

现有如下LaTeX表格代码：

\begin{table}[h!]
\caption{Top 5 letras menos frequentes retornadas pelo método \emph{Lossy Counter} quando se considera $e$ como $0.1, 0.01, 0.001$, Lossy($e$), comparando com as letras menos frequentes retornadas pelo método \emph{Exact Counter} - \textit{O Livro de Cesário Verde}}
\label{e_lossy}
\resizebox{\columnwidth}{!}{%
\begin{tabular}{| *{9}{c|}}
\hline
 \backslashbox{Top 5}{Counter} & \multicolumn{2}{c|}{Exact} & \multicolumn{2}{c|}{Lossy (0.1)} & \multicolumn{2}{c|}{Lossy (0.01)} & \multicolumn{2}{c|}{Lossy (0.001)}\ \hline
 1 & K & 4 & V & 340 & Y & 1 & Y & 47  \\ \hline
 2 & Y & 54 & P & 1426 & X & 72 & X & 155 \\
\hline
 3 & X & 155 & L & 2091 & J & 102 & J & 208 \\ \hline
 4 & J & 28 & C & 2527 & Z & 325 & Z & 344 \\ \hline
 5 & Z & 344 & T & 2833 & F & 701 & F & 701 \\ \hline
 Nº Letras & 25 &  & 15 & . & 24 & . & 24 & . \\ \hline
\end{tabular}%
}
\end{table}

当前表格最后一行“Nº Letras”的显示效果为：

NºLetras | 25 | .| 15 | . | 24 | . | 24 | . |

需要将该行修改为如下形式：

NºLetras | 25 | 15 | 24 | 24 |

其中25对应Exact列的整体统计值，15对应Lossy(0.1)列，24对应Lossy(0.01)列，24对应Lossy(0.001)列，即每个Counter对应的原两列合并为一列展示统计数值。

要实现需求效果，只需在最后一行用\multicolumn合并对应列，具体代码如下：

\begin{table}[h!]
\caption{Top 5 letras menos frequentes retornadas pelo método \emph{Lossy Counter} quando se considera $e$ como $0.1, 0.01, 0.001$, Lossy($e$), comparando com as letras menos frequentes retornadas pelo método \emph{Exact Counter} - \textit{O Livro de Cesário Verde}}
\label{e_lossy}
\resizebox{\columnwidth}{!}{%
\begin{tabular}{| *{9}{c|}}
\hline
 \backslashbox{Top 5}{Counter} & \multicolumn{2}{c|}{Exact} & \multicolumn{2}{c|}{Lossy (0.1)} & \multicolumn{2}{c|}{Lossy (0.01)} & \multicolumn{2}{c|}{Lossy (0.001)}\ \hline
 1 & K & 4 & V & 340 & Y & 1 & Y & 47  \\ \hline
 2 & Y & 54 & P & 1426 & X & 72 & X & 155 \\
\hline
 3 & X & 155 & L & 2091 & J & 102 & J & 208 \\ \hline
 4 & J & 28 & C & 2527 & Z & 325 & Z & 344 \\ \hline
 5 & Z & 344 & T & 2833 & F & 701 & F & 701 \\ \hline
 Nº Letras & \multicolumn{2}{c|}{25} & \multicolumn{2}{c|}{15} & \multicolumn{2}{c|}{24} & \multicolumn{2}{c|}{24} \\ \hline
\end{tabular}%
}
\end{table}

说明 #

• \multicolumn{2}{c|}{数值}用于合并每个Counter对应的两列，其中2代表合并列数，c|保证单元格居中对齐且保留右侧竖线，维持表格边框一致性。
• 移除了原行中多余的占位符（空格和.），直接将统计值放入合并后的单元格。

内容的提问来源于stack exchange，提问作者Goncalo Freitas