Wrong references in subfloat

subfigsubfloats

Recently I asked a question about the incompatibility of caption in revtex4-2. I utilized the suggestions but now I face new problems, e. g.:

the difference between the number style of the figure in the text and below it
I would like to place pictures side by side. I attach the file (I don't know how attach the pictures)

\documentclass[aps,pra,twocolumn,floatfix,footinbib,notitlepage,superscriptaddress,groupaddress,subcaption,caption,showpacs]{revtex4-2}
\usepackage{graphicx,graphics,times,bm,bbm,bbold,amssymb,amsmath,amsfonts,dsfont,hyperref,mathrsfs,color,cancel}
\usepackage{adjustbox}
\usepackage{tabularx}
\usepackage{tabulary}
\usepackage{tabularray}
\UseTblrLibrary{booktabs}
\usepackage{dcolumn}% Align table columns on decimal point
\usepackage{booktabs}
\usepackage{nicefrac}
\usepackage{subfig}
%\usepackage[mathlines]{lineno}% Enable numbering of text and display math
%\linenumbers\relax % Commence numbering lines
\usepackage{kantlipsum} % dummy text <<<<<<<<<<<<<<<
\begin{document}
   
   \preprint{AIP/123-QED}
       1.  \kant[1-2]
   %\title[Sample title]{Sample Title:\\with Forced Linebreak\footnote{Error!}}% Force line breaks with \\

   \begin{abstract}
       
   \end{abstract}
   
   \keywords{}
   \maketitle
   \begin{quotation}
       %   The ``lead paragraph'' is encapsulated with the \LaTeX\ 
       %   \verb+quotation+ environment and is formatted as a single paragraph before the first section heading. 
       %   (The \verb+quotation+ environment reverts to its usual meaning after the first sectioning command.) 
       %   Note that numbered references are allowed in the lead paragraph.
       %
       %   The lead paragraph will only be found in an article being prepared for the journal \textit{Chaos}.
   \end{quotation}
   
   \section{Introduction}\label{sec:introduction}
   \textcolor{blue}{As Fig.~(\ref{fig1}) and Fig.(\ref{fig2}) show there is a difference between the number of the picure in text and caption }
   \begin{figure}[ht!]\label{fig1}
       \subfloat[\label{subfig2a}]{%}
       \includegraphics[width=0.45\textwidth]{fig1}%
   }\hfill
   \subfloat[\label{subfig2b}]{%
       \includegraphics[width=0.45\textwidth]{fig2}%
   }\hfill
   \caption{caption for \ref{subfig2a} subfloat 1 \ref{subfig2b} subflot2}
\end{figure}

\begin{figure}[ht!]\label{fig2}
   \subfloat[\label{subfig3a}]{%}
   \includegraphics[width=0.45\textwidth]{fig1}%
}\hfill
\subfloat[\label{subfig3b}]{%
   \includegraphics[width=0.45\textwidth]{fig2}%
}\hfill
\caption{caption for \ref{subfig2a} subfloat 1 \ref{subfig2b} subflot2}
\end{figure}

2.  \kant[2-4]  
\end{document}
%
% ****** End of file aipsamp.tex ******

Best Answer

Try

\documentclass[aps,pra,twocolumn,floatfix,footinbib,notitlepage,superscriptaddress,groupaddress,subcaption,caption,showpacs]{revtex4-2}
\usepackage{graphicx}
\usepackage{xcolor}

%\usepackage[caption=false]{subfig}
\usepackage{subcaption}
\usepackage{lipsum}

\begin{document}
\section{Introduction}
\label{sec:introduction}
    \textcolor{blue}{As Fig.~(\ref{fig1}) and Fig.(\ref{fig2}) show there is a difference between the number of the picture in text and caption}
\begin{figure}[ht!]
\setkeys{Gin}{width=0.45\linewidth}
\subfloat[\label{subfig1a}]{\includegraphics{example-image-a}}
    \hfill
\subfloat[\label{subfig1b}]{\includegraphics{example-image-b}}

\caption{caption for \ref{subfig1a} subfloat-1 \ref{subfig1b} subflot-2}
\label{fig1}
\end{figure}

Referencing subfigures \ref{subfig1a} and \ref{subfig1b}.
\begin{figure}[ht!]
\setkeys{Gin}{width=0.45\linewidth}
\subfloat[\label{subfig2a}]{\includegraphics{example-image-a}}
    \hfill
\subfloat[\label{subfig2b}]{\includegraphics{example-image-b}}

\caption{caption for \ref{subfig2a} subfloat-1 \ref{subfig2b} subfloat-2}
\label{fig2}
\end{figure}

\begin{figure}[ht!]
\setkeys{Gin}{width=0.45\linewidth}
\subfloat[\label{subfig3a}]{\includegraphics{example-image-a}}
    \hfill
\subfloat[\label{subfig3b}]{\includegraphics{example-image-b}}

\caption{caption for \ref{subfig3a} subfloat-1 \ref{subfig3b} subfloat-2}
\label{fig3}
\end{figure}

Referencing subfigures \ref{subfig2a}, \ref{subfig2a},\ref{subfig3a} and \ref{subfig3b}, and figures \ref{fig2} and \ref{fig3}.

\lipsum[1-3]
\end{document}

From comparison of above code and your you should observe:

labels of figures should be after captions
MWE for your problem can be significantly shorter
It works also with recent subcaption package (version 1.3 or newest)
You not need to load graphics package (it is load by graphicx).
Please for images load example-image`s, which available to all

Addendum:

In the cases, that you like to have for example for image in figure, which span bot document columns, than you need to use figure* float. For example:

\documentclass[aps,pra,twocolumn,floatfix,footinbib,notitlepage,superscriptaddress,groupaddress,subcaption,caption,showpacs]{revtex4-2}
\usepackage{graphicx}
\usepackage{xcolor}

\usepackage{subcaption}
\usepackage{lipsum}

\begin{document}
\section{Introduction}
\label{sec:introduction}
\textcolor{blue}{As Fig.~(\ref{fig1}) and Fig.(\ref{fig2}) show there is a difference between the number of the picture in text and caption}
\begin{figure}[!ht]
\setkeys{Gin}{width=0.45\linewidth}
\subfloat[\label{subfig1a}]{\includegraphics{example-image-a}}
    \hfill
\subfloat[\label{subfig1b}]{\includegraphics{example-image-b}}

\caption{caption for \ref{subfig1a} subfloat-1 \ref{subfig1b} subflot-2}
\label{fig1}
\end{figure}

\lipsum[1]
\begin{figure*}
\setkeys{Gin}{width=0.22\linewidth}
\subfloat[\label{subfig2a}]{\includegraphics{example-image-a}}
    \hfill
\subfloat[\label{subfig2b}]{\includegraphics{example-image-b}}
    \hfill
\subfloat[\label{subfig2c}]{\includegraphics{example-image-a}}
    \hfill
\subfloat[\label{subfig2d}]{\includegraphics{example-image-b}}

\caption{caption for subfloats \ref{subfig2a}, \ref{subfig2b},  
         \ref{subfig2c} and \ref{subfig2d}.}
\label{fig2}
\end{figure*}

\textcolor{blue}{Referencing subfigures \ref{subfig2a}, \ref{subfig2a},\ref{subfig2c} and \ref{subfig2d} in figure \ref{fig2}.}

\lipsum[2-11]
\end{document}

Figure will appear at the top of the next page from point of it insertion.

Related Solutions

[Tex/LaTex] LaTeX Error: File subfigure.sty not found

In case you installed TeX Live from the packages of a Linux distro: Most distros split less-used LaTeX-packages into separate (Linux-distro)-packages. From the link in your question I assume that you are running Arch Linux. In this case you need to install the texlive-latexextra package which contains subfigure.sty. If you are using a different distro, the necessary package might be named differently (e.g. texlive-latex-extra in Debian/Ubuntu).

Also, as Peter notes, the subfigure package is depreciated.

[Tex/LaTex] Wrong reference number for subfloat

The subfig package is strongly dependent on the knowledge of the caption position -- is it above or below the figure or table?

An except of the subfig package documentation:

3.1.5 The Caption Position Option

The caption package ‘position’ option specifies whether the caption appears before or after the figure or table. This can adjust the relative spacing used to separate the float from the surrounding text. However, for the subfig package, it serves a more important function. That is it determines if the sub-floats belong to or are associated with the last \caption command to be given, or the next one to be executed sometime in the future. If you find that you sub-references do not agree with the top-level labels, than you may need to specifically set the ‘position’. This is best done when loading the caption package, but may be done at anytime with the \captionsetup command.

So usually this can be fixed using the correct position settings:

\documentclass{article}

\usepackage[demo]{graphicx}
\usepackage{subfig}

% Telling the subfig package the desired caption positions
\captionsetup[figure]{position=t}
\captionsetup[subfigure]{position=b}

\begin{document}
    \begin{figure}
        \caption{Two pictures side by side}
        \label{img:both}
        \subfloat[first picture]{
            \includegraphics[width=5cm]{name}
            \label{img:first}
        }
        \subfloat[second picture]{
            \includegraphics[width=5cm]{name}
            \label{img:second}
        }
    \end{figure}

    This example shows that figure \ref{img:second} has a wrong reference number.
    But the complete float is referenced correctly: \ref{img:both}
\end{document}

However, KOMA-Script is some kind of special here because it has its own options and commands for specifying the main caption position. The caption/subfig package respects (and supports) the KOMA-Script approach, making the code line \captionsetup[figure]{position=t} not only superfluous but without any effect. (See caption package documentation for details, section about "KOMA-Script".)

So with KOMA-Script classes, one need to use the options and/or commands offered by KOMA-Script instead, at least for the main caption, for example with "captions=figureheading":

\documentclass[captions=figureheading]{scrartcl}

\usepackage[demo]{graphicx}
\usepackage{subfig}

% Telling the subfig package the desired caption position
\captionsetup[subfigure]{position=b}

\begin{document}
    \begin{figure}
        \caption{Two pictures side by side}
        \label{img:both}
        \subfloat[first picture]{
            \includegraphics[width=5cm]{name}
            \label{img:first}
        }
        \subfloat[second picture]{
            \includegraphics[width=5cm]{name}
            \label{img:second}
        }
    \end{figure}

    This example shows that figure \ref{img:second} has a wrong reference number.
    But the complete float is referenced correctly: \ref{img:both}
\end{document}

And voilà the reference will be correct, even with KOMA-Script. (Please note that because of a bug in KOMA-Script the option "captions=figureheading" used to have no effect. This was fixed in version 3.11b of KOMA-Script. If you have to deal with older versions of KOMA-Script and updating is not an option, try using \captionabove instead of \caption.)

Best Answer

Related Solutions

[Tex/LaTex] LaTeX Error: File subfigure.sty not found

[Tex/LaTex] Wrong reference number for subfloat

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