cross-referencingformattingsubfloats
I'd like to know how to hack subfig in order to change the format of \subref. The current format, when subfig is initialized with listofformat=parens yields output like 4.5(b) . I'd like to add a space between the 4.5 and (b).
I know the documentation of subfig says that new formats can be defined with \DeclareSubrefFormat{hkeyword valuei}{hcodei} but I haven't managed to actually get hat to work.
Does anyone have an example of how the format can be changed?
For the subfig package see sections 2.2.2 and 3 of the documentation.
\documentclass{article}
\usepackage[subrefformat=parens,labelformat=parens]{subfig}
\begin{document}
See Figure~\subref*{sf1} for more information.
\begin{figure}
\centering
\subfloat[Subfig 1]{\label{sf1} Contents of the sub-figure}
\qquad
\subfloat[Subfig 2]{\label{sf2} Contents of the sub-figure}
\caption{A figure}
\label{fig}
\end{figure}
\end{document}
(Original answer)
Assuming you're using the subfloat package, section 4 of its documentation indicates you can do something like:
\renewcommand*\thesubfloatfigure{\themainfigure(\alph{subfloatfigure})}
to put the sub-number in parentheses.
You could update \CorrectChoice to insert an incremental \label. However, this would mean that only the most recent \CorrectChoice would be returned through a \theCorrectChoice call:
\documentclass{exam}% http://ctan.org/pkg/exam
\newcounter{correctchoicemark}% Counter to keep track of correct choice mark
\newcommand{\theCorrectChoice}{\ref{correctchoice-\thecorrectchoicemark}}% Print correct choice
\renewcommand{\choiceshook}{% Adapt \CorrectChoice to insert \label
\let\oldCorrectChoice\CorrectChoice% Store \CorrectChoice in \oldCorrectChoice
\renewcommand{\CorrectChoice}{%
\oldCorrectChoice% Original \CorrectChoice
\stepcounter{correctchoicemark}% Increment correct choice mark
\label{correctchoice-\thecorrectchoicemark}% \label original \CorrectChoice
}%
}
\let\oldoneparchoices\oneparchoices
\renewcommand{\oneparchoices}{%
\oldoneparchoices% Original oneparchoices environment start
\let\oldCorrectChoice\CorrectChoice% Store \CorrectChoice in \oldCorrectChoice
\renewcommand{\CorrectChoice}{%
\oldCorrectChoice% Original \CorrectChoice
\stepcounter{correctchoicemark}% Increment correct choice mark
\label{correctchoice-\thecorrectchoicemark}% \label original \CorrectChoice
}%
}
\begin{document}
\begin{questions}
\question This is a multiple choice question
\begin{choices}
\choice this is a choice
\choice this is another choice
\CorrectChoice this is the correct choice
\choice this is another choice
\end{choices}
The answer is \theCorrectChoice.
\question This is a multiple choice question
\begin{oneparchoices}
\choice this is a choice
\CorrectChoice this is another choice
\choice this is the correct choice
\choice this is another choice
\end{oneparchoices}
The answer is \theCorrectChoice.
\end{questions}
\end{document}
exam provides a hook into the choices environment via \choiceshook. Updating this to redefine \CorrectChoice is one (clean) way of inserting the appropriate code to obtain a \label you can \reference. oneparchoices does not provide this hook, so a different method altogether is employed in order to redefine \CorrectChoice.
More work is required for this solution to work correctly with hyperref.
Best Answer
The option
listofformatcontrols the way subfloat numbers are typeset in the List of Figures/Tables and the actual format of the string produced by the\subrefcommand. To change this format, you have to declare a new format using\DeclareCaptionListOfFormatand then use this new format in\captionsetup. In the second argument of the\DeclareCaptionListOfFormatcommand,#1represents the float number and#2represents the subfloat number. So to obtain the space between the float number and the subfloat number in the the LoF/LoT and when using\subref, you'll have to do something like the following:Here's the List of Figures obtained:
and a fragment of the document, showing the output produce by
\subref:If you only want to change the way
\subref*(note the star) typesets the string associated to a subfloat, without affecting the entries in the Lof/Lot, you have to declare a new format using\DeclareSubrefFormatand then use this format in\captionsetup. In the second argument of\DeclareSubrefFormatyou can use#1(the string associated to the float),#2(the string associated to the subfloat),#3(the value of the float counter) y#4(the value of the counter associated to the subfloat). A little example producing a space between the float and subfloat numbers:Now the LoF looks like this:
and the fragment showing the output of
\subref*: