6

An interesting one here. It could be a bug or I might be missing a trick. In my thesis I use \numberwithin{}{} to have numbering done within sections. Top level is chapter, so it goes <chapter>.<section>.<table counter>.

In my appendix, this is too much, so I only want numbering within the chapter i.e. <chapter>.<table counter>. Therefore numbering will run across different sections and the left most digit will go up when the chapter changes.

However, if I use \numberwithin after the appendix, then it subtly messes up the numbering. It gets the number of indices correct, however, the right most index doesn't change. My guess is, that it is confused and is still thinking it should be changing the third index (which isn't printed).

I have included a working example. Any one have a clue?

\documentclass{book}
\usepackage{amsmath}

\numberwithin{table}{section}

\begin{document}
   \chapter{Thing}
      \section{the first section}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

      \section{second section}  

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

\appendix
\numberwithin{table}{chapter}

   \chapter{first appendix chapter}
      \section{first appendix section}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

      \section{second appendix section}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

      \begin{table}[h!]
      \caption{wib}
         \begin{tabular}{c}
         hello
         \end{tabular}
      \end{table}

\end{document}
lockstep
  • 250,273
aghsmith
  • 2,716

1 Answers1

8

The problem is that the counter figure is bound to section and a later \numberwithin doesn't break this binding.

\usepackage{chngcntr}
\counterwithin{figure}{section}

...

\appendix
\counterwithout{figure}{section}
\counterwithin{figure}{chapter}

While \counterwithin is quite similar to \numberwithin, amsmath lacks the ability to unbind a counter from another.

egreg
  • 1,121,712
  • Seems like amsmath should change \numberwithin to handle it. Your solution works though, much appreciated. – aghsmith Sep 11 '11 at 21:37
  • @aghsmith -- \numberwithin was designed to be used only in the preamble, although that isn't documented. (i just checked with the maintainer; his response: "if it works, that would be a surprise.") this matter has been posted to the amsmath requests list for reconsideration at the next overhaul. – barbara beeton Sep 12 '11 at 20:37
  • @barbarabeeton : Was this ever updated? The current amsmath package documentation makes no mention of what you speak. http://mirror.hmc.edu/ctan/macros/latex/required/amslatex/math/amsldoc.pdf – kando Sep 01 '15 at 19:52
  • 1
    @kando -- no, this hasn't changed, and isn't likely to any time soon. the staff with the ability to make such changes is limited, and other projects have been assigned higher priority by management. – barbara beeton Sep 01 '15 at 21:08
  • @barbarabeeton : Could you weigh in on my similar question: http://tex.stackexchange.com/questions/264394/equation-number-syntax-section-subsection-subsubsection-equationnu – kando Sep 02 '15 at 15:32
  • @kando -- i see a detailed answer there from christian hupfer. does that do the job? (if so, you should vote it up and give it the check mark.) – barbara beeton Sep 02 '15 at 15:54
  • Important note: recent (post April 2019) versions of LaTeX have incorporated the features of chngcntr, so loading the package is no longer needed. – egreg Nov 28 '19 at 10:59