table numbering style

Question

The tables in my document are labeled 1...N; I like this format. I also have a table which belongs to the appendix of my paper that I would labeled A1 or A.1 . Is there a way to change the numbering style for just that one specific table? I use LyX for my editor.

Answer 1

Use \numberwithin from the amsmath package. MWE:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\section{Normal}
\begin{table}   
\caption{Normal Table}
\end{table}

\appendix
\numberwithin{table}{section}

\section{First Appendix}
\begin{table}
\caption{Table in Appendix}
\end{table}

\end{document}

EDIT: Having seen This note on numberwithin outside the preamble (and this) here's an alternative version:

\documentclass{article}
\usepackage{chngcntr}

\begin{document}

\section{Normal}
\begin{table}   
\caption{Normal Table}
\end{table}

\appendix
\counterwithin{table}{section}

\section{First Appendix}
\begin{table}
\caption{Table in Appendix}
\end{table}

\end{document}

Answer 2

From article.cls we found the definition of \appendix command:

\newcommand\appendix{\par
  \setcounter{section}{0}%
  \setcounter{subsection}{0}%
  \gdef\thesection{\@Alph\c@section}}

So the counters section and subsection are reseted. Also the command \thesection is defined to print the counter section using alphanumeric.

My suggestion is to use

\appendix
\makeatletter
\setcounter{table}{0}
\gdef\thetable{\@Alph\c@section.\@arabic\c@table}
\makeatother

to reset the table counter and define the command \thetable to print the section counter using alphanumeric followed by the table counter in arabic.

Answer 3

Or do it yourself very easily. Figures, tables, equations are all taken care of here. And you have \appendix for multiple appendices, or \appendix* for a single appendix.

\documentclass[12pt]{article}
\usepackage{boxhandler}

\makeatletter

\renewcommand\appendix{\@ifstar{\loneappendix}{\anappendix}}

\newcounter{appndx}
\setcounter{appndx}{0}

\newcommand \loneappendix [1]{
  \clearpage
  \refstepcounter{appndx}
  \setcounter{section}{\arabic{appndx}}
  \renewcommand\thesection {\appendixname~\Alph{appndx}.}
  \setcounter{subsection}{0}
  \renewcommand\thesubsection {\Alph{appndx}.\@arabic\c@subsection}
  \setcounter{paragraph}{0}
  \setcounter{subparagraph}{0}
  \setcounter{figure}{0}
  \renewcommand\thefigure{\Alph{appndx}\@arabic\c@figure}
  \setcounter{table}{0}
  \renewcommand\thetable{\Alph{appndx}\arabic{table}}
  \setcounter{equation}{0}
  \renewcommand\theequation {\Alph{appndx}-\arabic{equation}}
  \def\appendixtitle{\appendixname. #1}
  \addcontentsline{toc}{section}\appendixtitle
  \theappendix\appendixtitle
}

\newcommand \anappendix[1]{
  \clearpage
  \refstepcounter{appndx}
  \setcounter{section}{\arabic{appndx}}
  \renewcommand\thesection {\appendixname~\Alph{appndx}.}
  \setcounter{subsection}{0}
  \renewcommand\thesubsection {\Alph{appndx}.\@arabic\c@subsection}
  \setcounter{paragraph}{0}
  \setcounter{subparagraph}{0}
  \setcounter{equation}{0}
  \setcounter{figure}{0}
  \renewcommand\thefigure{\Alph{appndx}\@arabic\c@figure}
  \setcounter{table}{0}
  \renewcommand\thetable{\Alph{appndx}\arabic{table}}
  \renewcommand\theequation {\Alph{appndx}-\arabic{equation}}
  \def\appendixtitle{\appendixname~\Alph{appndx}. #1}
  \addcontentsline{toc}{section}\appendixtitle
  \theappendix\appendixtitle
}
\newcommand\theappendix[1]{
  \section*{#1}
}

\makeatother

\begin{document}
\section{First section}
\bxtable[ht]{Caption}{\rule{2in}{1in}}
\section{Second Section}
Text
\begin{equation}
 y =x^2 
\end{equation}

\appendix{First of Many Appendices}
Let's see if tables are renumbered

\bxtable[ht]{Caption}{\rule{2in}{1in}}
\bxfigure[ht]{Caption}{\rule{2in}{1in}}

\begin{equation}
 y =x^2 
\end{equation}

or I could have called one single appendix:

\appendix*{My Lone Appendix}

The rest follows.

\end{document}