# “Same as above” representation

When I have a table, where one row has the same content as above, is there a representation for that in latex?

In Germany we sometimes use ------- " -------- to say that the line here is the same as above.

So instead of having this:

| title | description          |
| Bla   | no description       |
| Blubb | no description       |
| Blop  | no description       |
| Blip  | no description       |


Have something like this:

| title | description          |
| Bla   | no description       |
| Blubb | ---------"---------- |
| Blop  | ---------"---------- |
| Blip  | ---------"---------- |


Maybe not with the dashed line, but a straight line. Is there a command for that or any other way to say that one line is above the other, without writing "see above"?

Forgot to mention: I use the longtable environment. My column types are {c|lp{4cm}p{4cm}}

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Related question: Is there a ditto symbol? –  diabonas Jul 13 '12 at 20:48
What is the column type of description? –  Werner Jul 13 '12 at 20:56
@diabonas Yes, that is the symbol I'm looking for. However, I would want to center the symbol, in a (To Werner) p{5cm} column type. –  cherrung Jul 13 '12 at 20:59
Don't use "ditto marks"; if the value can be inferred from the line above omit it, otherwise write it. You'll do a favor to your readers. :) –  egreg Jul 13 '12 at 22:11
@egreg How come? Are there certain guidelines? –  cherrung Jul 13 '12 at 22:18

Here's a draft of what you might be after, using the xhfill package (for leaders) and \textquotedbl (via the T1 encoding from fontenc, as suggested in Is there a ditto symbol?):

\documentclass[a4paper]{scrartcl}
\usepackage[T1]{fontenc}% http://ctan.org/pkg/fontenc
\usepackage{longtable}% http://ctan.org/pkg/longtable
\usepackage{xhfill}% http://ctan.org/pkg/xhfill
\newcommand{\ditto}[1][.4pt]{\xrfill{#1}~\textquotedbl~\xrfill{#1}}
\begin{document}

\begin{longtable}{c|lp{4cm}p{4cm}}
\hline
Title & Heading & Description & Blop \\
Bla   & A & no description & Blop \\
Blubb & B & \ditto & Blip  \\
Blop  & C & \ditto & Blubb \\
Blip  & D & \ditto[1pt] & Blop  \\
\hline
\end{longtable}
\end{document}​


xhfill is not really required, but it's small enough to use as-is. The default width of the leader/rule drawn by \xrfill is .4pt according to the definition of \ditto[<width>], unless specified otherwise.

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Very nice. My textquotedbl results in curved quotes, instead of straigt ones. Is there a way to force straight ones? And I noticed that the lines are pretty close to the top row, especially if the text in a preceding column spans multiple rows. Is it possible to have a top margin? –  cherrung Jul 13 '12 at 21:49
If, by "pretty close to the top row" you mean that the leader (horizontal line) is "too high", you can use \xrfill[.7ex]{#1} in your definition of \ditto instead. \xrfill takes an optional argument that raises the horizontal leader (default is 1ex). –  Werner Jul 13 '12 at 22:00
It may also be feasible to use \renewcommand{\textquotedbl}{\texttt{"}} if you don't want to use a different font encoding that supplies \textquotedbl (like T1 does). –  Werner Jul 13 '12 at 22:00
Thanks for the advice with \renewcommand. By "too close" I actually mean that if I have an \hline both the hline and the \ditto are very close to each other. See: d.pr/i/OHbM Would be nice to have a "top margin". –  cherrung Jul 13 '12 at 22:06
Perhaps try this definition of \ditto: \newcommand{\ditto}[1][1ex]{\xrfill[.7ex]{.4pt}~\rule{0pt}{#1}\textquotedbl~\xr‌​fill[.7ex]{.4pt}} and then you can use \ditto[\normalbaselineskip] for the first row with an \hline above it, and just \ditto everywhere else. The optional argument to \ditto now takes a length that denotes the vertical strut inserted rather than the width of the leader. The width is now fixed to .4pt (the usual LaTeX default rule width). –  Werner Jul 13 '12 at 22:15