Graphics, Figures & Tables ⇒ subcaption shared by subfigures within float

[lauraf]

Hi all,

I am a bit confused about the use of ContinuedFloat and the subcaption package. I have:

Code: Select all

\documentclass{book}

\usepackage{hyperref}

\usepackage{caption}
\usepackage[list=on]{subcaption}

\begin{document}

\begin{figure}
    \centering
    \unitlength .5cm
    \subcaptionbox{SubFig1\label{fig:testsub1}}
    {%
        \begin{picture}(10,10)
            \put(0,0){\line(1,1){10}}
        \end{picture}
    }
    \par
    \vspace{10pt}
    \subcaptionbox{SubFig2\label{fig:testsub2}}
    {%
        \begin{picture}(10,10)
            \put(0,10){\line(1,-1){10}}
        \end{picture}
    }
    \caption{Testfigures}
    \label{fig:test2}
\end{figure}

\begin{figure}
\ContinuedFloat
    \centering
    \unitlength .5cm
    \subcaptionbox{SubFig1\label{fig:testsub1}}
    {%
        \begin{picture}(10,10)
            \put(0,0){\line(1,1){10}}
        \end{picture}
    }
    \par
    \vspace{10pt}
    \subcaptionbox{SubFig2\label{fig:testsub2}}
    {%
        \begin{picture}(10,10)
            \put(0,10){\line(1,-1){10}}
        \end{picture}
    }
    \caption{Testfigures}
    \label{fig:test2}
\end{figure}

\end{document}

So for each float I have two subfigures. As it is now, each subfigure has its own subcaption, but what I want instead is for each float to have one subcaption shared by the two subfigures.

I have tried moving things around in various ways but am totally confused on what should go where! Any help much appreciated.

Many thanks,
Laura

[sommerfee]

So for each float I have two subfigures. As it is now, each subfigure has its own subcaption, but what I want instead is for each float to have one subcaption shared by the two subfigures.

I'm sorry, but I'm not sure if I have understood you correctly.

If you want to have no sub-captions (but only a single figure caption), just don't use \subcaptionbox at all.

If you want to have a single sub-caption for two pictures, just put the two pictures inside a single \subcaptionbox.

HTH,
Axel

[lauraf]

Hi Axel,

Thanks, sorry my post wasn't clear

What I want is a single sub-caption for two pictures. I had tried putting the two pictures inside a single \subcaptionbox, as you suggest. For example:

Code: Select all

   \subcaptionbox{SubFig1\label{fig:testsub1}}
    {%
        \begin{picture}(10,10)
            \put(0,0){\line(1,1){10}}
        \end{picture}
    \par
    \vspace{10pt}
        \begin{picture}(10,10)
            \put(0,10){\line(1,-1){10}}
        \end{picture}
    }

The problem with this is that it seems to ignore the \par instruction (and I need the two pictures to be one on top of the other rather than side by side). I am sure there is a pretty obvious way of doing this but I can't seem to figure it out (LaTeX newbie...)!

Many thanks!
Laura

[sommerfee]

The problem with this is that it seems to ignore the \par instruction (and I need the two pictures to be one on top of the other rather than side by side).

Oh yes, you are right, and I'm sorry, I totally forgot this. \subcaptionbox uses a horizontal box inside to measure its width and there vertical stuff (like \\, \par etc.) will get ignored.

I should have mentioned it in the subfigure documentation, will fix this for the next release.

I am sure there is a pretty obvious way of doing this

You could use a subfigure environment for this. A subfigure uses a minipage internally and inside it vertical stuff is allowed, e.g.:

Code: Select all

\documentclass{book}

\usepackage{hyperref}

\usepackage{caption}
\usepackage[list=on]{subcaption}

\begin{document}

\begin{figure}
  \begin{subfigure}{\linewidth}
    \centering
    \unitlength .5cm
        \begin{picture}(10,10)
            \put(0,0){\line(1,1){10}}
        \end{picture}
    \par
    \vspace{10pt}
        \begin{picture}(10,10)
            \put(0,10){\line(1,-1){10}}
        \end{picture}
    \caption{SubFig1 and SubFig2\label{fig:testsub1}}
  \end{subfigure}
  \caption{Testfigures}
  \label{fig:test1}
\end{figure}

\begin{figure}
\ContinuedFloat
  \begin{subfigure}{\linewidth}
    \centering
    \unitlength .5cm
        \begin{picture}(10,10)
            \put(0,0){\line(1,1){10}}
        \end{picture}
    \par
    \vspace{10pt}
        \begin{picture}(10,10)
            \put(0,10){\line(1,-1){10}}
        \end{picture}
    \caption{SubFig3 and SubFig4\label{fig:testsub3}}
  \end{subfigure}
  \caption{Testfigures (continued)}
  \label{fig:test2}
\end{figure}

\end{document}

If you have questions about this please don't hesitate to ask.

HTH,
Axel