[Tex/LaTex] Referencing subfigures in main caption (with \subfloat and \subref)

cross-referencingsubcaptionsubfloats

I've used subfloat to include subfigures, with their relevant labels but with empty captions. what I'm going to do is to reference these figures with \subref in the main caption of the figure. But what I get is only ?? signs in the caption [main caption]. I can't figure out what's the problem. this is what I have:

\begin{figure}
\centering
\subfloat[][]
{
\includegraphics[scale=0.55]{signal}
\label{signal_model}
}
\subfloat[][]
{
\includegraphics[scale=0.55]{amplitude}
\label{amplitude_mod}
}
\caption{phase noise variability: \subref{signal model} some text \subref{amplitude_mod} some other text}
\end{figure}

Best Answer

You need to \protect the \subref command in the caption:

\caption{Phase noise variability: \protect\subref{signal_model} some text 
  \protect\subref{amplitude_mod} some other text}

MWE:

\documentclass{article}
\usepackage{graphicx}
\usepackage{subfig}
\begin{document}

\begin{figure}
\centering

\subfloat[][]{\includegraphics[scale=0.55]{example-image-a}\label{signal_model}}
\subfloat[][]{\includegraphics[scale=0.55]{example-image-b}\label{amplitude_mod}}

\caption{Phase noise variability: \protect\subref{signal_model} some text 
  \protect\subref{amplitude_mod} some other text}

\end{figure}
\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Creating a second caption for a figure that won’t appear in the figure’s list index and is aligned with the first

Here's one possible solution using some features provided by the caption package: basically, \caption for the numbered caption and \caption* for the unnumbered caption and some calculations to align both captions; the customization of the list of figures was done using the tocloft package:

\documentclass{article}
\usepackage{tocloft}
\usepackage[small]{caption}

\captionsetup[figure]{labelsep=period,textformat=period,font=it}

% some auxiliary lengths for aligning the captions
\newlength\mylena
\newlength\mylenb

% syntax: \MyCaption{First numbered caption}{Second unnumbered caption}
\newcommand\MyCaption[2]{%
  \captionsetup{belowskip=-\baselineskip}
  \settowidth\mylena{\small\itshape\figurename~\thefigure. #1.}
  \settowidth\mylenb{\small\itshape #2.}
  \caption{#1}
  \caption*{\hspace*{\dimexpr\mylenb-\mylena\relax} #2}
  \setlength\belowcaptionskip{\baselineskip}
}

% settings for the list of figures
\renewcommand\cftfigpresnum{Figure }
\renewcommand\cftfigaftersnum{.}
\newlength\mylend
\settowidth\mylend{\cftfigpresnum\cftfigaftersnum}
\addtolength\cftfignumwidth{\mylend}

\begin{document}

\listoffigures

\begin{figure}
  \centering
  \rule{6cm}{2cm}
  \MyCaption{Gauntlet}{Source: Atari Games 1990}
 \end{figure}

\begin{figure}
  \centering
  \rule{8cm}{2cm}
  \MyCaption{Some test text}{And some more text for testing purposes}
 \end{figure}

\end{document}

enter image description here

[Tex/LaTex] Referencing Subfigure in Subfloat

First of all \subfloat was indeed defined in very early versions of the subcaption package but this was never a documented feature (and has proven to be a very bad idea anyway since it was not 100% compatible with \subfloat offered by the subfig package). As equivalent the subcaption package offers the (well documented) command \subcaptionbox with a slightly different (and enhanced) syntax and behaviour:

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{caption}
\usepackage{subcaption}

\begin{document}

\begin{figure}
     \subcaptionbox{A subcaption.\label{figure:subfigure1}}{\includegraphics[width=2cm]{logo}}
     \caption{A caption.}
     \label{figure:figure1}
\end{figure}

\noindent
Subfigure \ref{figure:subfigure1}, Figure \ref{figure:figure1}.

\end{document}

(Please note when using \subcaptionbox the \label needs to be placed inside the caption argument, not inside the content argument.)

Best Answer

Related Solutions

[Tex/LaTex] Creating a second caption for a figure that won’t appear in the figure’s list index and is aligned with the first

[Tex/LaTex] Referencing Subfigure in Subfloat

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