[Tex/LaTex] align inside of tabular

aligntables

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?

Best Answer

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

Related Solutions

[Tex/LaTex] Align equations inside tabular

As noted in comments your line is too wide

Overfull \hbox (39.00003pt too wide) in paragraph at lines 8--22

Due to paragraph indentation and 4 \tabcolsep (15+4*6=39pt).

If you simplify the markup, removing the tabular, the line fits the page, and you can use align with no problems:

enter image description here

\documentclass{article}      % Specifies the document class

\usepackage{amsmath, amsfonts, mathtools, xfrac, empheq}
\usepackage{caption}


\begin{document}       % End of preamble and beginning of text.

\noindent
\begin{minipage}{0.6\textwidth}
\begin{align}
    V^\pi &= E_\pi \{ R_t \mid s_t = s \} \\
    &= E_\pi \left \{ \sum\limits_{k=0}^\infty \gamma^k r_{t+k+1} \mid s_t = s \right \}  \notag \\
    &= E_\pi \left \{ r_{t+1} + \gamma \sum_{k=0}^\infty \gamma^k r_{t+k+2} \mid s_t =s \right\} \notag
\end{align}
\end{minipage}\hfill
\begin{minipage}{0.4\textwidth}
%\includegraphics[width=\textwidth]{olcar_L11-8}
\captionof{figure}{Backup diagram}
\end{minipage}


\end{document}

[Tex/LaTex] tabu package – gaps in vertical lines

One way is to shift up the skip prior to the mid-height \tabucline with a \\[-1pt]. See below for 2nd approach.

%Dokumentclass
\documentclass[landscape]{letter}

%Packages
\usepackage[landscape]{geometry}
\usepackage[utf8]     {inputenc}
\usepackage           {multirow}
\usepackage           {tabu}

%Formatting
\pagestyle{empty} %Remove numbering

\begin{document}
  \begin{tabu}{ |[1pt] l | l l | l | l |[1pt] }
                                                                                                                 \tabucline[1 pt]{1-5}
    \multicolumn{2}{ |[1pt] l }{ } & \multicolumn{3}{ |[1pt] l |[1pt]}{ }                                     \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } & \multicolumn{2}{  l |[1pt] }{ }   \\                       \hline
 y   &                              & \multicolumn{1}{ |[1pt] l |     }{ } & \multicolumn{2}{  l |[1pt] }{ }   \\[-1pt]   \tabucline[1 pt]{3-5} 
\hline
 x   &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\ \tabucline[1 pt]{1-5}
  \end{tabu}
\end{document}

enter image description here

Alternately, if you want the thin line to bisect the thick line, then the approach: \\[-1pt] \tabucline[1 pt]{3-5}\\[-12.5pt]\hline works.

%Dokumentclass
\documentclass[landscape]{letter}

%Packages
\usepackage[landscape]{geometry}
\usepackage[utf8]     {inputenc}
\usepackage           {multirow}
\usepackage           {tabu}

%Formatting
\pagestyle{empty} %Remove numbering

\begin{document}
  \begin{tabu}{ |[1pt] l | l l | l | l |[1pt] }
                                                                                                                 \tabucline[1 pt]{1-5}
    \multicolumn{2}{ |[1pt] l }{ } & \multicolumn{3}{ |[1pt] l |[1pt]}{ }                                     \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } & \multicolumn{2}{  l |[1pt] }{ }   \\                       \hline
 y   &                              & \multicolumn{1}{ |[1pt] l |     }{ } & \multicolumn{2}{  l |[1pt] }{ }   \\[-1pt]   \tabucline[1 pt]{3-5}\\[-12.5pt]
\hline
 x   &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\                       \hline
    &                              & \multicolumn{1}{ |[1pt] l |     }{ } &                                 & \\ \tabucline[1 pt]{1-5}
  \end{tabu}
\end{document}

enter image description here

Best Answer

Code

Output

Related Solutions

[Tex/LaTex] Align equations inside tabular

[Tex/LaTex] tabu package – gaps in vertical lines

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