space between columns titles in tabular

Question

I am having trouble doing the following in the tabular environment:

title1   title2
------   ------
a        1
b        2
.        .
.        .
.        .
z        26

That, having only the column titles underlined and instead of the usual line across all columns. I want the space in between columns without having a vertical line in between columns.

Answer 1

I suggest you give the booktabs package a try. The following MWE (Minimum Working Example) shows how one might use its commands \toprule, \bottomrule, and \cmidrule. These commands work pretty much like the LaTeX commands \hline and \cline, except that they provide much better spacing above and below the horizontal lines. In addition, the lines created by \toprule and \bottomrule are heavier (thicker) than those created by \midrule and \cmidrule, further contributing to a polished appearance of the table.

\documentclass{article}
\usepackage{booktabs}
\begin{document}
\begin{tabular}{cc}
\toprule
title1 & title2 \\
\cmidrule(r){1-1} \cmidrule(l){2-2}
a & 1\\
$\vdots$ & $\vdots$\\
z & 26 \\
\bottomrule
\end{tabular}
\end{document}