[Tex/LaTex] Global caption issue with table when using subcaption package

subcaptiontables

Firstly I apologize if this had been answered before. I have tried looking for it anywhere but I couldn't find any solution.

Anyway, I have a trouble with the caption of my table when I included the subcaption package.

This is the excerpt of the code:

    \documentclass{ifacconf}
    \usepackage{natbib}
    \usepackage{graphicx}
    \usepackage{subcaption}

    \begin{document}

    \begin{table}[hb]
        \centering
        \caption{Test eheh blah}
        \begin{tabular}{|c|c|c|c|} \hline
            \multicolumn{4}{|c|}{Margin settings} \\
            \hline
            Page & Top & Bottom & Left/Right \\ \hline
            First & 3.5 & 2.5 & 1.5 \\ \hline
            Rest & 2.5 & 2.5 & 1.5 \\ \hline
         \end{tabular}
    \end{table}

    \end{document}

And the output is

withSubcaption http://imageshack.com/scaled/800×600/513/0o0l.jpg

However, if I removed the subcaption package, the output is as expected

withoutSubcaption http://imageshack.com/scaled/800×600/513/75c3.jpg

So, I would really appreciate any help. Thanks.

Cheers.

EDITED:

Following Harish Kumar answer, although it does solve the caption issue in my table, it causes problem in the captions of my other subfigure. Here is the code of the subfigure.

    \usepackage{epstopdf}
    \begin{figure}[htb!]
        \centering
        \begin{subfigure}{0.38\textwidth}
            \centering
            \includegraphics[width=\textwidth]{pic1.eps}
            \caption{test caption}
            \label{fig:pic1}
        \end{subfigure}
        \\
        \begin{subfigure}{0.38\textwidth}
            \centering
            \includegraphics[width=\textwidth]{pic2.eps}
            \caption{test caption}
            \label{fig:pic2}
        \end{subfigure}
        \caption{Long caption Long caption.}
        \label{fig:pictures}
    \end{figure}

And the output

subfigure http://imageshack.com/scaled/800×600/534/7ufa.jpg

Best Answer

The ifacconf class is not compatible with caption, as the warning

Package caption Warning: Unsupported document class (or package) detected,
(caption)                usage of the caption package is not recommended.
See the caption package documentation for explanation.

tells you. This means that also subcaption cannot be used.

In these cases, the good old subfig package usually comes to the rescue, but there's a catch: the class defines \captionwidth as a command, whereas subfig defines it as a dimension register. Moreover, the class wrongly does

\let\endfigure\end@float
\let\endtable\end@float

This makes the class incompatible with subfig too.

Workaround:

\documentclass{ifacconf}
\usepackage{natbib}
\usepackage{graphicx}

\makeatletter
\def\endfigure{\end@float}
\def\endtable{\end@float}
\makeatother

\let\ifacconfcaptionwidth\captionwidth
\usepackage[caption=false]{subfig}
\let\captionwidth\ifacconfcaptionwidth

\begin{document}

\begin{table}[htbp]

\centering
\caption{Test eheh blah}
\begin{tabular}{|c|c|c|c|} \hline
\multicolumn{4}{|c|}{Margin settings} \\
\hline
Page & Top & Bottom & Left/Right \\ \hline
First & 3.5 & 2.5 & 1.5 \\ \hline
Rest & 2.5 & 2.5 & 1.5 \\ \hline
\end{tabular}

\end{table}

\begin{table}[htbp]

\centering
\caption{Test eheh blah}

\subfloat[A subcaption]{%
  \begin{tabular}{|c|c|c|c|} \hline
  \multicolumn{4}{|c|}{Margin settings} \\
  \hline
  Page & Top & Bottom & Left/Right \\ \hline
  First & 3.5 & 2.5 & 1.5 \\ \hline
  Rest & 2.5 & 2.5 & 1.5 \\ \hline
  \end{tabular}%
}

\subfloat[B subcaption]{%
  \begin{tabular}{|c|c|c|c|} \hline
  \multicolumn{4}{|c|}{Margin settings} \\
  \hline
  Page & Top & Bottom & Left/Right \\ \hline
  First & 3.5 & 2.5 & 1.5 \\ \hline
  Rest & 2.5 & 2.5 & 1.5 \\ \hline
  \end{tabular}%
}

\end{table}

\end{document}

So long as you don't use subfig options to change the appearance of the subcaptions, this should be sufficient.

A perhaps better workaround might be

\documentclass{ifacconf}
\usepackage{natbib}
\usepackage{graphicx}

\makeatletter
\def\endfigure{\end@float}
\def\endtable{\end@float}
\makeatother

\usepackage[caption=false]{subfig}
\usepackage{etoolbox}

\AtBeginEnvironment{figure}{\setlength{\captionwidth}{0.8\linewidth}}
\AtBeginEnvironment{table}{\setlength{\captionwidth}{0.8\linewidth}}
\captionsetup[subfloat]{width=.7\captionwidth}

\begin{document}


\begin{table}[htbp]

\centering
\caption{Test eheh blah}
\begin{tabular}{|c|c|c|c|} \hline
\multicolumn{4}{|c|}{Margin settings} \\
\hline
Page & Top & Bottom & Left/Right \\ \hline
First & 3.5 & 2.5 & 1.5 \\ \hline
Rest & 2.5 & 2.5 & 1.5 \\ \hline
\end{tabular}

\end{table}

\begin{table}[htbp]

\centering
\caption{Test eheh blah}

\subfloat[A subcaption]{%
  \begin{tabular}{|c|c|c|c|} \hline
  \multicolumn{4}{|c|}{Margin settings} \\
  \hline
  Page & Top & Bottom & Left/Right \\ \hline
  First & 3.5 & 2.5 & 1.5 \\ \hline
  Rest & 2.5 & 2.5 & 1.5 \\ \hline
  \end{tabular}%
}

\subfloat[B subcaption]{%
  \begin{tabular}{|c|c|c|c|} \hline
  \multicolumn{4}{|c|}{Margin settings} \\
  \hline
  Page & Top & Bottom & Left/Right \\ \hline
  First & 3.5 & 2.5 & 1.5 \\ \hline
  Rest & 2.5 & 2.5 & 1.5 \\ \hline
  \end{tabular}%
}

\end{table}

\end{document}

but my advice is “don't use subfloats with this class”.

Related Solutions

[Tex/LaTex] Subcaption package: compatibility issue

The very recent version of the subcaption package will even issue an error:

! Package caption Error: The `subcaption' package does not work correctly
(caption)                in compatibility mode.

The only way to get around this is to specify the option compatibility=false to the caption package:

\documentclass{cifa}

\usepackage{subcaption}
\captionsetup{compatibility=false}

\begin{document}
\begin{figure}
\parbox{4cm}{\subcaption{This is a subcaption}\label{sub}}
\caption{nothing}
\label{nothing}
\end{figure}

See figure \ref{nothing}: there is \ref{sub} inside...

\end{document}

PLEASE NOTE: This way the customization of the captions done by the cifa document class will be overwritten by the caption package in a brute-force manner. In best case the output of the captions will look different (and some caption-related stuff offered by the cifa document class will not work anymore), in worst case you'll get error messages and weird output. So please also take a look at the caption package documentation, section "6 Package Support". Since this is a perfect method to shoot oneself in the foot, an extra warning is always issued when using the compatibility=false option:

Package caption Warning: Forced redefinition of \caption since the
(caption)                unsupported(!) package option `compatibility=false'
(caption)                was given.
See the caption package documentation for explanation.

If you do not want this (or it does not work anyway) then the only solution left is not-using the subcaption package. Use the subfig package with option caption=false (which prevents loading of the caption package) instead:

\documentclass{cifa}

\usepackage[caption=false]{subfig}

\begin{document}
\begin{figure}
\subfloat[This is a subcaption\label{sub}]{............}
\caption{nothing}
\label{nothing}
\end{figure}

See figure \ref{nothing}: there is \ref{sub} inside...

\end{document}

[Tex/LaTex] Subfigure arrangment with no caption with IEEE format

You don't need caption or subcaption, if you don't want any special label for the graphics.

\documentclass[final]{IEEEtran}
\usepackage{kantlipsum} %<- For dummy text
\usepackage{mwe} %<- For dummy images

\title{The research}
\author{The researcher}

\begin{document}
\maketitle
\begin{abstract}
\kant[1]
\end{abstract}

\kant[1-4]

\begin{figure}
\centering
\raisebox{-.5\height}{%
  \includegraphics[height=4cm,width=3cm]{example-image-a}%
}\qquad
\raisebox{-.5\height}{%
  \includegraphics[height=2cm,width=3cm]{example-image-b}%
}
\caption{The proper caption}
\label{figab}
\end{figure}
\end{document}

I imposed height and width to the images in order to emulate your real situation, where the two pictures have different heights.

With \raisebox{-.5\height} we shift vertically the reference point (usually at the bottom) for each picture, so they come out automatically center aligned. With \qquad I add some separation; leave it out (changing it into a %) if you don't want any space.

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Subcaption package: compatibility issue

[Tex/LaTex] Subfigure arrangment with no caption with IEEE format

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