cross-referencing
In my document, I reference a string of sections within a sentence. A representative example would be:
I am referencing Sections \ref{A}, \ref{B}, \ref{C}.
This then comes out t something like:
I am referencing Sections 6.1, 6.2, 6.3.
How can I get it to display:
I am referencing Sections 6.1-3
without hard-coding it?
While I'd like to see a solution involving the zref package, here's a quick fix using etoolbox. The new \myref command will automatically precede each equation number with the section number unless it is issued in the section where the associated label was defined.
\documentclass{book}
\usepackage{etoolbox}
\makeatletter
\apptocmd{\label}{%
\protected@write\@auxout{}{%
\csxdef{secnum@#1}{\thesection}%
}%
}{}{}
\newcommand*{\myref}[1]{%
(% Optional
\edef\@tempa{\thesection}%
\ifcsequal{secnum@#1}{@tempa}{%
}{%
\csname secnum@#1\endcsname.%
}%
\ref{#1}%
)% Optional
}
\makeatother
\usepackage{chngcntr}
\counterwithout{equation}{chapter}
\counterwithin*{equation}{section}
\begin{document}
\chapter{first}
\section{bla}
As shown in equation~\myref{eq:abc} \dots
\section{blubb}
As shown in equation~\myref{eq:abc} \dots
\begin{equation}\label{eq:abc}
a^2 + b^2 = c^2
\end{equation}
\begin{equation}\label{eq:def}
d^2 + e^2 = f^2
\end{equation}
\section{foo}
As shown in equation~\myref{eq:abc} \dots
\end{document}
EDIT: I must stress that my code doesn't work with hyperref and therefore is at best a first step to a solution.
EDIT 2: Changed code in order to work with the book class, using package chngcntr.
You can redefine \p@figure to produce the desired formatting (but this will only change the formatting of the string used for cross-references; the string used for captions will remain unaltered):
\documentclass{book}
\makeatletter
\renewcommand\p@figure{\thechapter-\arabic{figure}\expandafter\@gobble}
\makeatother
\begin{document}
\chapter{Test Chapter}
See figure~\ref{fig:test} in section~\ref{sec:test}...
\section{test}\label{sec:test}
\begin{figure}[!ht]
\caption{Test Figure}
\label{fig:test}
\end{figure}
\end{document}
And combining this with the cleveref package, you can say something like this:
\documentclass{book}
\usepackage{cleveref}
\makeatletter
\renewcommand\p@figure{\thechapter-\arabic{figure}\expandafter\@gobble}
\makeatother
\crefname{figure}{figure}{figures}
\Crefname{figure}{Figure}{Figures}
\begin{document}
\chapter{Test Chapter}
See \cref{fig:test} in \cref{sec:test}...
\section{test}\label{sec:test}
\begin{figure}[!ht]
\caption{Test Figure}
\label{fig:test}
\end{figure}
\end{document}
[!ht] as placement specifier just for this example; I am not recommending its usage.x.y using a different string x-y. I would suggest you to reconsider this change.For consistency's sake, I would prefer to change \thefigure so the strings used in the object numbering and the one used in the cross-reference will be the same:
\documentclass{book}
\usepackage{cleveref}
\makeatletter
\renewcommand\thefigure{\mbox{\thechapter-\arabic{figure}}}
\makeatother
\crefname{figure}{figure}{figures}
\Crefname{figure}{Figure}{Figures}
\begin{document}
\chapter{Test Chapter}
See \cref{fig:test} in \cref{sec:test}...
\section{test}\label{sec:test}
\begin{figure}[!ht]
\caption{Test Figure}
\label{fig:test}
\end{figure}
\end{document}
Best Answer
Using the
cleverefpackage you can compress a range and using\crefstripprefix(recent versions of the package), you can remove the common prefixes from reference range:Using
\crefrangelabelformatyou can customize the format for a range of references. It has the syntax:The first argument specifies the
<type>of references that will be customized; for the second argument, thecleverefdocumentation explains:\crefstripprefixsimply removes the prefix (the chapter number, in this case) from the second part of the range.Here's an enhanced example in which the prefix has been stripped out for cross-references to ranges of sections, subsections and equations: