Reference appendix objects within texts as 'A. 1', but not 'Appendix A. 1'

Question

Consider a document using elsearticle package, and involving an appendix:

\documentclass{elsarticle}

\begin{document}

... briefly explained in~\ref{sec:subAppendix}

\appendix
\section{Appendix}
\subsection{Sub-appendix}
\label{sec:subAppendix}

\end{document}

When one refers this appendix object within the text:

... briefly explained in~\ref{sec:subAppendix}.

The number assigned to the object is printed with a word 'Appendix' as follows:

... briefly explained in Appendix A.1.

How can we suppress/remove the word 'Appendix', and make the appendix object appears like in the following?:

... briefly explained in A.1.

This seems to be class and package dependent. Please give us a complete minimal working example (MWE) so we can see what causes this. — Skillmon, Jan 31 '18 at 10:01

score 2 · Accepted Answer · 2018-03-01T09:49:25.423

elsarticle defines \thesection as \appendixname \Alph{section} within \appendix -- as such, \thesubsection expands to \appendix \Alph{section}.\arabic{subsection}, finally being Appendix A.1 etc.

While this might alright for the typesetting, the references might become tedious and lengthy.

Redefinition of \p@subsection by gobbling the content first and re-injection of the pure \Alph{section}.\arabic{subsection} will remove this for the references.

See https://tex.stackexchange.com/a/397724/31729 for a similar approach.

Another possibility is to refine \thesection for the appendix.

\documentclass{elsarticle}

\makeatletter
\def\@gobbleappendixname#1\csname thesubsection\endcsname{\Alph{section}.\arabic{subsection}}
\renewcommand{\p@subsection}{\@gobbleappendixname}
\makeatother

\begin{document}



... briefly explained in~\ref{sec:subAppendix}

\appendix
\section{Appendix}

\subsection{Sub-appendix} 

\label{sec:subAppendix}

\end{document}

Regarding the complaints of the OP:

\documentclass{elsarticle}


\makeatletter
\def\@gobbleappendixname#1\csname thesubsection\endcsname{\Alph{section}.\arabic{subsection}}
\g@addto@macro{\appendix}{\renewcommand{\p@subsection}{\@gobbleappendixname}}
\makeatother



\begin{document}

\section{Foo} \label{firstsection}

\subsection{Foo subsection} \label{foosubsection}

... briefly explained in~\ref{sec:subAppendix} or in \ref{firstsection} or in \ref{firstappendixsection} or in \ref{foosubsection}

\appendix




\section{Appendix} \label{firstappendixsection}

\subsection{Sub-appendix} 

\label{sec:subAppendix}

\end{document}

Of course changing \thesection would be easier, but that will change the typesetting of section titles etc. as well... — , Jan 31 '18 at 19:19
The above code example unfortunately also changes the subsection numeration of the main text. For example, please consider \ref{section:Methodology} returns 3.4. With the above code, this starts to return C.4. Just to let you know. — Herpes Free Engineer, Mar 01 '18 at 09:42
@Kuti: There is no section:Methodology label, to begin with ... And it does not return something like C.4 or 3.4 -- The changes were meant to use on the appendix code only, nothing else, but I have shifted it to the \appendix macro ;-) — , Mar 01 '18 at 09:50

Reference appendix objects within texts as 'A. 1', but not 'Appendix A. 1'

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