The \cmidrule in booktabs package has trim option to specify how much to trim from left or right. However from the following example \cmidrule(l{2pt}r{2pt}){1-2}
shows the line is shifted, not shortened; I may be confused about the this trim option, but I expected 2 points from left and right should be removed (trimmed).
The next code \cmidrule(l{2pt}r{2pt}){3-3}
is even more confusing to show that the line is shifted to the left.
How to interpret the trim option with \cmdrule
?
\documentclass[12pt]{article}
\usepackage{booktabs}
\begin{document}
\begin{tabular}{@{}llr@{}}
\toprule
\multicolumn{2}{c}{Item} &\multicolumn{1}{c}{Price/lb} \\
\cmidrule(r){1-2}\cmidrule(l){3-3}
a & b & c \\
\cmidrule(l{2pt}r{2pt}){1-2}\cmidrule(l{2pt}r{2pt}){3-3}
\morecmidrules
\cmidrule(l{2pt}r{2pt}){2-3}
\addlinespace[5pt]
Food& Category & \multicolumn{1}{c}{\$}\\
\midrule
Apples & Fruit & 1.50 \\
Oranges & Fruit & 2.00 \\
\addlinespace
Beef & Meat & 4.50 \\
\specialrule{.5pt}{3pt}{3pt}
x & y & z \\
\bottomrule
\end{tabular}
\end{document}
Best Answer
Your interpretation of the trim option is correct. What seems confusion here is the fact that removed the column space on the outer edges of your
tabular
.When considering the
tabular
version without the end\tabcolsep
removedthe adjustments for
\cmidrule
using thel
eft andr
ight trim options seem more in line with what one would expect.The default trim, if not specified explicitly is
\cmidrulekern
which is set to.5em
. This equates to5pt
under the10pt
(default) document class option,5.475pt
under11pt
and5.87494pt
under12pt
. Perhaps, instead of specifying trims in absolute values, is a font-related width likeem
.