Change style of references to memoir's subfloats

Question

Is there a way to configure the style of references to memoir's built-in subfloats, i.e. when using \subcaptionref, and \ref? For example, is it possible to remove the parentheses?

From the memoir documentation:

Figure \ref{fig:twosubfig} has two subfigures,
  namely \ref{sf:1}, \subcaptionref{sf:2}.

\begin{figure}
\centering
\subbottom[Subfigure 1]{\fbox{SUBFIGURE ONE}\label{sf:1}}
\hfill
\subbottom[Subfigure 2]{\fbox{SUBFIGURE TWO}\label{sf:2}}
\caption{Figure with two subfigures} \label{fig:twosubfig}
\end{figure}

produces

Figure 10.19 has two subfigures, namely 10.19(a), (b).

Can this be changed to e.g.

Figure 10.19 has two subfigures, namely 10.19a, b.

To be clear, the changes should preferably only apply to the reference, not the subcaption itself.

I have found an answer in the related questions here, which says that the parentheses are hardwired as of 2011. Is this still the case? — , Oct 28 '15 at 12:26
It is, it is on my todo list, but not with high priority. You might want to consider the subfig package or similar — daleif, Oct 28 '15 at 12:29
@daleif Thanks for the quick response, if you put this into an answer I'll accept it straight away. As for using another package, it's not important enough for that. — , Oct 28 '15 at 12:45
Possible duplicate of Adding parentheses around subfig references — Zarko, Oct 28 '15 at 13:26
I have edited the question to reflect that I was specifically asking about memoir's options for configuring such a thing, not other packages, which I know of and use regularly. This could be useful for anyone asking themselves "is this possible in memoir or do I need another package?" and therefore, the answer by @daleif is perfectly valid. — , Oct 28 '15 at 13:38

score 1 · Answer 1 · answered Oct 28 '15 at 16:17

The following updates the way subcaption references are written to the .aux, making \subcaptionref pull the appropriate non-parenthesized reference:

\documentclass{memoir}

\usepackage{etoolbox}

\newsubfloat{figure}
\newcommand{\thesubfigureref}{\alph{subfigure}}
\makeatletter
\AtBeginDocument{
  \patchcmd{\sf@@memsub@label}% <cmd>
    {\@nameuse{@@thesub\@captype}}% <search>
    {\@nameuse{thesub\@captype ref}}% <replace>
    {}{}% <success><failure>
}
\makeatother

\begin{document}

\setcounter{chapter}{9}% Just for this example
\chapter{A chapter}
\setcounter{figure}{18}% Just for this example

Figure \ref{fig:twosubfig} has two subfigures,
  namely \ref{fig:twosubfig}\subcaptionref{sf:1}, \subcaptionref{sf:2}.

\begin{figure}[ht]
  \centering
  \subbottom[Subfigure 1]{\fbox{SUBFIGURE ONE}\label{sf:1}}
  \subbottom[Subfigure 2]{\fbox{SUBFIGURE TWO}\label{sf:2}}
  \caption{Figure with two subfigures} \label{fig:twosubfig}
\end{figure}

\end{document}

Changes are required if you're loading the hyperref package (or nameref package) as well.

If I parse this correctly, the @@thesub<type> command is responsible for printing the reference, and is by default defined as thesub<type>, which contains the parentheses. Would it therefore not suffice to simply redefine \@namedef{@@thesubfigure}{\alph{subfigure}} globally and get the references as I want them for plain, nameref and hyperref all at once? — , Oct 28 '15 at 17:12
Or actually just \def\@@thesubfigure{\alph{subfigure}} as I don't think \@namedef does anything else in this case. — , Oct 28 '15 at 17:21
@user5254: Yes, that's a good option. Add \makeatletter \def\@@thesubfigure{\alph{subfigure}} \makeatother after \begin{document}. — Werner, Oct 28 '15 at 18:13

score 1 · Accepted Answer · answered Oct 29 '15 at 09:03

From Werner's answer and a bit of digging through memoir.cls, it follows that it is much easier to change the subfigure counter to the desired style, e.g. no parentheses, and afterwards fix the subcaption label using the \@thesubfigure macro.

\documentclass[oneside]{memoir}

% works with and without hyperref
%\usepackage{hyperref}

% create a figure subfloat
\newsubfloat{figure}

% change style
\makeatletter
\def\thesubfigure{\alph{subfigure}}
\def\@thesubfigure{(\alph{subfigure})%
            \if@tightsubcap\hskip\subfloatlabelskip\else\space\fi}
\makeatother

\begin{document}

Figure \ref{fig:twosubfig} has two subfigures,
  namely \ref{sf:1}, \subcaptionref{sf:2}.

\begin{figure}[h]
\centering
\subbottom[Subfigure 1]{\fbox{SUBFIGURE ONE}\label{sf:1}}
\hfill
\subbottom[Subfigure 2]{\fbox{SUBFIGURE TWO}\label{sf:2}}
\caption{Figure with two subfigures} \label{fig:twosubfig}
\end{figure}

\end{document}

Change style of references to memoir's subfloats

2 Answers2