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I've got a table full of phasors, and I'm trying to write it as follows:

\documentclass[a4paper,journal]{article}
\usepackage[cmex10]{amsmath}
\begin{document}
\begin{table}[h!]
    \caption{Bus Voltages}
    \label{tab:appdx-busvoltages}
    \begin{center}
        \begin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}
        \hline

        \hline
        \textbf{Bus} & \multicolumn{2}{c}{\textbf{$V$ (p.u.)}} \\
        \hline
            b1 & 1.0 & 0.00 & * \\
            b2 & 0.8983 & -7.12& \\
            b3 & 0.9136 & -5.80 &\\
            b4 & 0.8841 & -9.01 &\\
        \hline

        \hline
        \end{tabular}
    \end{center}
    * \textbf{b1} is the `slack bus', and has such has a fixed voltage.
\end{table}
\end{document}

It works, in that it produces the following output:

Output

But I also get a stack of errors:

paper1.tex:111: Illegal parameter number in definition of \reserved@a. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@fortmp. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@nextchar. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Illegal parameter number in definition of \@preamble. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:111: Only one # is allowed per tab. [...gin{tabular}{c|r@{$\angle$}r@{$^\circ$}l}]
paper1.tex:117: Missing # inserted in alignment preamble. [         b1 & 1.0 &]
paper1.tex:117: Missing $ inserted. [           b1 & 1.0 &]
paper1.tex:117: Missing $ inserted. [           b1 & 1.0 &]
paper1.tex:117: Missing $ inserted. [           b1 & 1.0 &]
paper1.tex:117: Missing $ inserted. [           b1 & 1.0 &]
paper1.tex:118: Missing # inserted in alignment preamble. [         b2 & 0.8983 &]
paper1.tex:118: Missing $ inserted. [           b2 & 0.8983 &]
paper1.tex:118: Missing $ inserted. [           b2 & 0.8983 &]
paper1.tex:118: Missing $ inserted. [           b2 & 0.8983 &]
paper1.tex:118: Missing $ inserted. [           b2 & 0.8983 &]
paper1.tex:119: Missing # inserted in alignment preamble. [         b3 & 0.9136 &]
paper1.tex:119: Missing $ inserted. [           b3 & 0.9136 &]
paper1.tex:119: Missing $ inserted. [           b3 & 0.9136 &]
paper1.tex:119: Missing $ inserted. [           b3 & 0.9136 &]
paper1.tex:119: Missing $ inserted. [           b3 & 0.9136 &]
paper1.tex:120: Missing # inserted in alignment preamble. [         b4 & 0.8841 &]
paper1.tex:120: Missing $ inserted. [           b4 & 0.8841 &]
paper1.tex:120: Missing $ inserted. [           b4 & 0.8841 &]
paper1.tex:120: Missing $ inserted. [           b4 & 0.8841 &]
paper1.tex:120: Missing $ inserted. [           b4 & 0.8841 &]

If I remove the @{$\angle$} from my column definitions in \begin{tabular}{... then the errors go away. Any idea why this is occurring / how I can achieve the same formatting without incurring these errors?

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closed as too localized by Qrrbrbirlbel, Kurt, lockstep, Guido, Thorsten Nov 20 '12 at 7:13

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

    
While code snippets are useful in explanations, it is always best to compose a fully compilable MWE that illustrates the problem including the \documentclass and the appropriate packages so that those trying to help don't have to recreate it. While solving problems is fun, setting them up is not. Then those trying to help can simply cut and paste your MWE and get started on solving problem. –  Peter Grill Nov 20 '12 at 3:34
    
cheers. I'll get on to that now. –  Fabian Tamp Nov 20 '12 at 3:35
1  
works for me if I load the array package –  cmhughes Nov 20 '12 at 3:36
    
Yep, I think @cmhughes has the answer. But also, please ensure that the image provided actually corresponds to the MWE given. –  Peter Grill Nov 20 '12 at 3:39
1  
Yep, that's done it. Thanks @cmhughes! I'll set this up with a MWE for completeness anyway. –  Fabian Tamp Nov 20 '12 at 3:40
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1 Answer 1

up vote 1 down vote accepted

Works for me if I load the array package.

\documentclass{article}
\usepackage{array}

\begin{document}

\begin{table}[h!]
    \caption{Bus Voltages}
    \label{tab:appdx-busvoltages}
    \centering
        \begin{tabular}{c|r@{$\angle$}l@{$^\circ$}l}
        \hline

        \hline
        \textbf{Bus} & \multicolumn{3}{c}{\textbf{$V$ (p.u.)}} \\
        \hline
            b1 & 1.0 &  & * \\
            b2 & 0.8983 && \\
            b3 & 0.9136 & &\\
            b4 &  & &\\
        \hline

        \hline
        \end{tabular}

    * \textbf{b1} is the `slack bus', and has such has a fixed voltage.
\end{table}

\end{document}

On another note, have a look at Should I use center or centering for figures and tables?

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thanks for that other note on \center too :) –  Fabian Tamp Nov 20 '12 at 3:55
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