align inside of tabular

Question

Today I failed using an align-environment inside of a tabular-environment.

Consider the following example:

\documentclass[12pt]{scrbook}
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}

\begin{document}

\begin{tabular}{ll}
      A & B \\%
      & %
\begin{align}
    A &= B \\
    C &= D
\end{align}%
      \\%
    \end{tabular}%

\end{document}

When I try this I'll get an error claiming: "Argument of \align has an extra }." and "Paragraph ended before \align was complete." and much more.

When I enclose everything in paraphrases (like {\begin{align}.....\end{align}}) I'll get some other errors: "Missing \endgroup inserted." and multiple "Missing } inserted."

How can I use the align-environment properly inside of a table?

It should look like: A | B \ (blank) | (equation) \ – MrD Jun 27 '13 at 16:30 — MrD, Jun 27 '13 at 16:30
You should use the aligned environment here. – Qrrbrbirlbel Jun 27 '13 at 16:32 — Qrrbrbirlbel, Jun 27 '13 at 16:32

Qrrbrbirlbel · Accepted Answer · 2017-03-07T23:54:53.100

35

When I enclose everything in paraphrases (like {\begin{align}.....\end{align}}) I'll get some other errors: "Missing \endgroup inserted." and multiple "Missing } inserted."

It works alright in the following examples.

Code

\documentclass[12pt,parskip=full]{scrbook}
\usepackage{amsmath}
\usepackage{tabularx}
\usepackage[pass,showframe]{geometry}
\begin{document}
\begin{tabular}{l|l|}
      A & B \\
        & {$\!\begin{aligned} % http://tex.stackexchange.com/q/98482/16595 
               A &= B \\    % http://tex.stackexchange.com/q/78788/16595
               C &= D \end{aligned}$}
\end{tabular}

\hrulefill

\begin{tabular}{l|p{5cm}|}
      A & B \\
        & {\begin{align}
               A &= B \\
               C &= D \end{align}}
\end{tabular}

\hrulefill 

\begin{tabularx}{\linewidth}{l|X|}
      A & B \\
        & {\begin{align}
               A &= B \\
               C &= D \end{align}}
\end{tabularx}
\end{document}

Output

enter image description here

edited Mar 07 '17 at 23:54

answered Jun 27 '13 at 16:34

Qrrbrbirlbel

119,821

http://tug.org/pipermail/texhax/2009-April/012236.html – ted Jun 27 '13 at 16:50
This is working, but I get no tags (the equations are not numbered). – MrD Jun 27 '13 at 17:36
2

@DL6ER The align environment does need a line width (it stretches). So you’ll want to use a p column or something with the X column of tabularx. – Qrrbrbirlbel Jun 27 '13 at 17:58
6

So what was the solution here? Just to use tabularx instead of tabular? – David Doria Jun 30 '14 at 11:46
3

I get errors while running your code! :( – Hosein Rahnama Feb 26 '17 at 16:08
1

@H.R. Someone ate my backslashes. It should work now. – Qrrbrbirlbel Mar 07 '17 at 23:55

score 2 · Answer 2 · edited Jun 16 '17 at 12:55

An alternative to tabular is cals tables: enter image description here

\documentclass[12pt]{scrbook}
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{cals}
\begin{document}

\begin{calstable}
\colwidths{{10mm}{40mm}}
\brow
\cell{A}
\cell{B}
\erow
\brow
\cell{}
\cell{
  \begin{align}
      A &= B \\
      C &= D
  \end{align}%
}
\erow
\end{calstable}
\end{document}

align inside of tabular

2 Answers2

Code

Output

Linked