How to draw a double \hline in a table without interrupting vertical lines

Question

I need to draw a double line after the first row in a table, but when using \hline twice, this interrupts the vertical lines:

\documentclass{article}
\begin{document}

\begin{tabular}{|c|c|c|}
\hline 
1 & 2 & 3 \\ \hline \hline
4 & 5 & 6 \\ \hline
7 & 8 & 9 \\ \hline
\end{tabular}

\end{document}

produces:

enter image description here

This is without using any additional packages. How can I change this is such a ways that the vertical lines are not interrupted?

I tried this: 1 & 2 & 3 \\ \hhline{} but then the horizontal line just disappears. I also tried 1 & 2 & 3 \\ \hhline{===} but then the vertical lines were still interrupted. If not that, what is the proper argument for this function? — Jelle, Aug 30 '13 at 14:24

score 65 · Accepted Answer · edited Mar 20 '20 at 18:05

65

\documentclass{article}
\usepackage{hhline}
\begin{document}

\begin{tabular}{|c|c|c|}
\hline 
1 & 2 & 3 \\ \hhline{|=|=|=|}
4 & 5 & 6 \\ \hline
7 & 8 & 9 \\ \hline
\end{tabular}

\end{document}

enter image description here

edited Mar 20 '20 at 18:05

user1271772

594
6
26

answered Aug 30 '13 at 15:24

David Carlisle

757,742

8

In case you have a table with a double vertical line, see here: http://tex.stackexchange.com/q/152101/23992 – Keelan Oct 25 '14 at 21:36
2

I think there's a spelling error, hhline is not defined. Also, I can't seem to get this to work when the layout is |c c|c c|. – Dmitri Nesteruk Mar 17 '15 at 11:33
4

@DmitriNesteruk if hhline is not defined then you have not copied the code correctly to include the hhline package. – David Carlisle Mar 17 '15 at 11:44
@DavidCarlisle ahh, missed that, thanks. incidentally, in my case, the argument ended up being |==|==|... but this makes no sense! :) sigh – Dmitri Nesteruk Mar 17 '15 at 12:33
2

@DmitriNesteruk why does it make no sense? |==|==| is what I would expect if your columns are specified as |cc|cc| – David Carlisle Mar 17 '15 at 12:35
@DavidCarlisle I kind of assumed that the space between the c tags had some meaning. I guess not. Thanks for the explanation, btw, have some +1s. – Dmitri Nesteruk Mar 17 '15 at 17:30
What would be corresponding solution for \cline{}? – user22180 Aug 02 '15 at 20:37
@user22180 |==|~~| ? – David Carlisle Aug 02 '15 at 21:43

F. Pantigny · Answer 2 · 2024-03-31T17:49:46.770

With {NiceTabular} of nicematrix, the vertical rules cross the double horizontal rules (of \hline\hline).

\documentclass{article}
\usepackage{nicematrix}
\begin{document}
\begin{NiceTabular}{|c|c|c|}
\hline 
1 & 2 & 3 \ \hline \hline
4 & 5 & 6 \ \hline
7 & 8 & 9 \ \hline
\end{NiceTabular}
\end{document}

In fact, with {NiceTabular}, you have a key hvlines to draw all the horizontal and vertical rules and you still have the ability to put a \Hline\Hline where you want (\Hline is provided by nicematrix and draws the rule with PGF/TikZ instead of using the standard \hline).

\documentclass{article}
\usepackage{nicematrix}
\begin{document}
\begin{NiceTabular}{ccc}[hvlines]
1 & 2 & 3 \ \Hline\Hline
4 & 5 & 6 \ 
7 & 8 & 9 \ 
\end{NiceTabular}
\end{document}

The output is the same.

How to draw a double \hline in a table without interrupting vertical lines

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