Subfigura a subfigura título

Question

Soy nuevo en LaTeX. No estoy seguro de cómo formular mi pregunta. Pero lo formularé de manera que sea comprensible.

Me gustaría hacer una subfigura, pero el título debe ser

caption of subfigure a-1 caption of subfigure a-2

caption of subfigure b-1 caption of subfigure b-2

                 `caption  of entire figure`

Intenté usar subfigure, pero obtengo continuamente a,b,c,d, pero necesito nombrarlos como se mencionó anteriormente (a-1, a-2, b-1, b-2). En mi situación, hay posibilidades de que las subfiguras estén en páginas diferentes.

Answer 1

Esto utiliza la misma idea que subequationsen amsmath.

\documentclass{article}

\usepackage{graphicx}
\usepackage{subcaption}

\makeatletter
\newcounter{parentsubcaption}
\newenvironment{subsubcaption}
 {\refstepcounter{sub\@captype}%
  \protected@edef\theparentsubcaption{\@nameuse{thesub\@captype}}%
  \setcounter{parentsubcaption}{\value{sub\@captype}}%
  \setcounter{sub\@captype}{0}%
  \@namedef{thesub\@captype}{\theparentsubcaption--\arabic{sub\@captype}}%
  \ignorespaces
}{%
  \setcounter{sub\@captype}{\value{parentsubcaption}}%
  \ignorespacesafterend
}
\makeatother

\begin{document}

\begin{figure}
\centering
\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure a--1}\label{a--1}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure a--2}\label{a--2}
\end{subfigure}
\end{subsubcaption}

\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure b--1}\label{b--1}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure b--2}\label{b--2}
\end{subfigure}
\end{subsubcaption}

\caption{caption  of entire figure}
\end{figure}

References:
\ref{a--1} and \subref{a--1};
\ref{b--1} and \subref{b--1}.

\end{document}

EDITAR

El código anterior realmente no funciona si se utilizan más entornos de figuras subsubcaption. Aquí hay una solución alternativa que intenta funcionar bien también con \ContinuedFloat.

\documentclass{article}

\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{etoolbox}
\makeatletter
\newif\ifsubsubcaption@ContinuedFloat
\newif\ifsubsubcaption@nonfirst
\patchcmd{\ContinuedFloat}
  {\caption@ContinuedFloat}
  {\subsubcaption@ContinuedFloattrue\caption@ContinuedFloat}
  {}{}

\newcounter{parentsubcaption}
\newenvironment{subsubcaption}
 {\refstepcounter{sub\@captype}%
  \protected@edef\theparentsubcaption{\@nameuse{thesub\@captype}}%
  \setcounter{parentsubcaption}{\value{sub\@captype}}%
  \setcounter{sub\@captype}{0}%
  \@namedef{thesub\@captype}{\theparentsubcaption--\arabic{sub\@captype}}%
  \ignorespaces
}{%
  \setcounter{sub\@captype}{\value{parentsubcaption}}%
  \ignorespacesafterend
}
\BeforeBeginEnvironment{subsubcaption}{%
  \ifsubsubcaption@ContinuedFloat
  \else
    \ifsubsubcaption@nonfirst
    \else
      \subsubcaption@nonfirsttrue
      \setcounter{sub\@captype}{0}%
    \fi
  \fi
}
\makeatother

\begin{document}

\begin{figure}
\centering
\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure a--1}\label{a--1}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure a--2}\label{a--2}
\end{subfigure}
\end{subsubcaption}

\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure b--1}\label{b--1}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure b--2}\label{b--2}
\end{subfigure}
\end{subsubcaption}

\caption{caption  of entire figure}
\end{figure}

References:
\ref{a--1} and \subref{a--1};
\ref{b--1} and \subref{b--1}.

\begin{figure}
\ContinuedFloat
\centering
\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure c--1}\label{c--1}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure c--2}\label{c--2}
\end{subfigure}
\end{subsubcaption}

\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure d--1}\label{d--1}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure d--2}\label{d--2}
\end{subfigure}
\end{subsubcaption}

\caption{caption  of entire figure (continued)}
\end{figure}

\begin{figure}
\centering
\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure a--1}\label{a--1-x}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure a--2}\label{a--2-x}
\end{subfigure}
\end{subsubcaption}

\begin{subsubcaption}
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure b--1}\label{b--1-x}
\end{subfigure}\qquad
\begin{subfigure}{5cm}
\includegraphics[width=\linewidth]{example-image}
\caption{caption of subfigure b--2}\label{b--2-x}
\end{subfigure}
\end{subsubcaption}

\caption{caption  of entire figure}
\end{figure}

\end{document}

La figura “continuación” tiene etiquetas cyd, mientras que la siguiente “nueva” tiene ayb nuevamente.