How can I change the appearance of the "figure" counter?

Question

In the following code the figure number is shown as 1.1. How can I change the figure number format to 1-1?

\documentclass{book}
\usepackage{graphicx}
\usepackage{caption}


\begin{document}
\chapter{One}
test
\begin{figure}[ht!]
\centering
 \includegraphics[scale=0.5]{10.png} \caption{} \label{handle}
\end{figure}

Figure \ref{handle}.
\end{document}

do you want to change it only in ref? what about in caption (Figure 1.1: caption)? — touhami, Feb 12 '16 at 06:34

touhami · Accepted Answer · 2016-02-12T06:52:57.697

4

Here is a solution

\documentclass{book}
\usepackage{graphicx}
\usepackage{caption}
\renewcommand\thefigure{\ifnum \value{chapter}>0 \thechapter-\fi \arabic{figure}}

\begin{document}
\chapter{One}
test
\begin{figure}[ht!]
\centering
 \includegraphics[scale=0.5]{myfoto} \caption{bla} \label{handle}
\end{figure}

Figure \ref{handle}.
\end{document}

edited Feb 12 '16 at 06:52

answered Feb 12 '16 at 06:37

touhami

19,520

it does not work for me with xelatex. – Minimus Heximus Feb 12 '16 at 06:39
it shows only one number. But I want both numbers like 1-1. – Minimus Heximus Feb 12 '16 at 06:42
Will this method reset the within-chapter figure number back to "1" at the start of every chapter? – Mico Feb 12 '16 at 08:07
@Mico no, it doesn't but the class book does so yes the figure counter will be reset at every (unstarred) chapter start. – touhami Feb 12 '16 at 08:40
@Mico I am voting for reopening this question. here the O.P. want to change the format of counter. – touhami Feb 12 '16 at 14:40
@touhami - You're right. I've joined in on the re-open drive. :-) I've also edited the posting's title since it's not about \ref per se. – Mico Feb 12 '16 at 14:44

How can I change the appearance of the "figure" counter?

1 Answers1