Please use the code tags to mark your code.
I only see the summary of columns but not of rows.
The
center
environment is ended without having been started. It not only centers its content, but also adds vertical spaces before and after it, which is already done by the floating environment.
Code: Select all
\documentclass[11pt]{article}
\begin{document}
\begin{table}[ht]
\centering% added to center the content
\caption{Partial horizontal line}
\label{tab:multicol}% moved in favor of the overview
\begin{tabular}{ccc}
\hline
\multicolumn{2}{c}{Multi-column}&\\
\cline{1-2}
X&X&X\\
X&X&X\\
\hline
\end{tabular}
%\end{center}
\end{table}
\end{document}
You may be interested in the
booktabs package.