[Tex/LaTex] Reset `equation` counter for any section change, regardless of section depth

countersnumbering

I would like the equation counter to reset automatically whenever a \section command is called, independent of section depth:

\section
\subsection
\subsubsection
\paragraph
\subparagraph

MWE Description:

The most brute force method would be to \setcounter{equation}{0} whenever a section command is called. This method has been superceded by the chngcntr package.

Currently, the chngcntr package is used to reset the equation counter. This will reset the counter automatically if the next section is at the same depth; however, the \counterwithin* command must be used each time the section depth is altered.

The current MWE code was originally developed here by user Christian Hupfer.

MWE:

\documentclass{scrartcl}

\usepackage{geometry}                   % margin/page layout settings
\usepackage{scrlayer-scrpage}           % improved header commands. [supercedes `fancyhdr' package].

\usepackage{mathtools}                  % includes amsmath, supplements it.
\usepackage{chngcntr}                   % allows changing equation section depth mid-document
\usepackage{etoolbox}


% Margin Settings:
\KOMAoptions{fontsize   = 12pt    ,
             parskip    = half-   ,
             headheight = 1.000em , 
             footheight = 2.700em , 
             DIV        = current }

\geometry{letterpaper              ,
          hmargin      = 0.750in   ,
          tmargin      = 0.750in   ,
          bmargin      = 0.750in   ,
          headsep      = 1.000em   ,
          footskip     = 3.700em   } % [ = Footheight + Footsep]


%Initialize headers and footers
\chead{\normalfont Header 1 \\ Header 2}
\cfoot{\normalfont Footer 1 \\ Footer 2}
\ofoot{\normalfont Page \thepage}


% Section numbering: Format \paragraph like \subsection
\newcommand{   \subsubsubsection} [1] {    \paragraph{#1} }
\newcommand{\subsubsubsubsection} [1] { \subparagraph{#1} }

\setcounter{secnumdepth}{5}

\makeatletter
\renewcommand{\paragraph}               %
  {\@startsection{paragraph}{4}{\z@}    %
  {-2.5ex\@plus -1ex \@minus -.25ex}    %
  {1.25ex \@plus .25ex}                 %
  {\normalfont\sffamily\normalsize\bfseries}     }

\renewcommand{\subparagraph}               %
  {\@startsection{subparagraph}{4}{\z@}    %
  {-2.5ex\@plus -1ex \@minus -.25ex}    %
  {1.25ex \@plus .25ex}                 %
  {\normalfont\sffamily\normalsize\bfseries}     }

\makeatother






% Equation Numbering
\let\origtheequation\theequation
\counterwithin*{equation}{section}

\newcommand{\xequationFormat} {\determineSection-\arabic{equation}}
\newcommand{\determineSection}{%
  \ifnum\value{subsection}    > 0
  \ifnum\value{subsubsection} > 0
  \ifnum\value{paragraph}     > 0
  \ifnum\value{subparagraph}  > 0 \thesubparagraph
  \else                           \theparagraph      \fi
  \else                           \thesubsubsection  \fi
  \else                           \thesubsection     \fi
  \else                           \thesection        \fi
}

\newcommand{\eqSectionDepth} [2] { \counterwithout*{equation}{#1}\counterwithin*{equation}{#2} }
% syntax: \equationNumbering{oldSectionDepth}{newSectionDepth}


% For demonstration purposes only:
\newtoggle{enableFormat}
\newcommand{\toggleformat}%
{ \iftoggle{enableFormat}%
  {%
    \togglefalse{enableFormat}%               % 0
    \let\theequation\origtheequation% 
  }%
  {%
    \toggletrue{enableFormat}%                % 1
    \let\theequation\xequationFormat%
  }%
}






\begin{document}

\setcounter{section}{-1}

\section{Level 1}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}
\subsection{Level 2}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}
\subsubsection{Level 3}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}
\subsubsubsection{Level 4}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}
\subparagraph{Level 5}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\clearpage

\toggleformat

\section{Level 1}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{section}{subsection}
\subsection{Level 2}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{subsection}{subsubsection}
\subsubsection{Level 3}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{subsubsection}{paragraph}
\subsubsubsection{Level 4}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{paragraph}{subparagraph}
\subparagraph{Level 5}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}
\eqSectionDepth{subparagraph}{section}

\clearpage

\section{Level 1}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{section}{subsection}
\subsection{Level 2}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{subsection}{subsubsection}
\subsubsection{Level 3}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{subsubsection}{paragraph}
\subsubsubsection{Level 4}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}

\eqSectionDepth{paragraph}{subparagraph}
\subparagraph{Level 5}
\begin{equation} x \end{equation}
\begin{equation} x \end{equation}
\eqSectionDepth{subparagraph}{section}

\end{document}

Best Answer

Just use a set of \counterwithin* instructions:

\counterwithin*{equation}{section}% Reset equation at \section
\counterwithin*{equation}{subsection}% Reset equation at \subsection
\counterwithin*{equation}{subsubsection}% Reset equation at \subsubsection
\counterwithin*{equation}{paragraph}% Reset equation at \paragraph
\counterwithin*{equation}{subparagraph}% Reset equation at \subparagraph

The starred version doesn't update \theequation. It's equivalent to

\makeatletter
\@addtoreset{equation}{section}
\@addtoreset{equation}{subsection}
\@addtoreset{equation}{subsubsection}
\@addtoreset{equation}{paragraph}
\@addtoreset{equation}{subparagraph}
\makeatother

The latest (2015) release of LaTeX handles counter resetting slightly differently. Instead of resetting the counter to 0, it sets it to -1 followed by a \stepcounter. This performs a hierarchical cascading effect of counter resetting. As such, it suffices to use

\counterwithin*{equation}{subparagraph}

\makeatletter
\@addtoreset{equation}{subparagraph}
\makeatother

Related Solutions

[Tex/LaTex] How to reset chapter and section counter with \part

This small example is working fine for me:

\documentclass[]{book}
\usepackage[]{hyperref}

\makeatletter
\@addtoreset{chapter}{part}
\makeatother  

\begin{document}
\tableofcontents
\part{Test}
\chapter{One}
\chapter{Two}
\part{Test}
\chapter{Three}
\chapter{Four}
\end{document}

So please provide your minimal example showing the problem. Thank you.

[Tex/LaTex] \subsubsubsection, \paragraph and \subparagraph count not reset when starting a new section, subsection, etc

The immediate problem is that you need the counter for paragraphs to be reset when you start a new subsubsubsection. To do this, all you need to do is add:

\@addtoreset{paragraph}{subsubsubsection}

Note, though, that you probably will also find you want to add some further resets depending on the structure of your document.

More generally, I have to say that the fact that you find the need to do this indicates to me that you need to rethink the structure of your document. Even if you are writing a book or thesis (for which article would not be a suitable class), 9 levels is just going to be confusing. The only exception is probably legal documentation which seems to positively require insane levels of hierarchy. I think you should really be asking what you expect your readers to gain from the structure in terms of clarity. If the answer is nothing or, worse, greater complexity and confusion, you know you need to rethink.

However, this is TeX SE and so I can provide a 'solution' with a clean conscience since the site is not in the business of ensuring people write well, but only of assisting them to write whatever they do in TeX.

\documentclass{article}
\usepackage{titlesec}
\titleclass{\subsubsubsection}{straight}[\subsection]

\newcounter{subsubsubsection}[subsubsection]

\renewcommand\thesubsubsubsection{\thesubsubsection.\arabic{subsubsubsection}}
\renewcommand\theparagraph{\thesubsubsubsection.\arabic{paragraph}}
\renewcommand\thesubparagraph{\theparagraph.\arabic{subparagraph}}

\titleformat{\subsubsubsection}
  {\normalfont\normalsize\bfseries}{\thesubsubsubsection}{1em}{}
\titlespacing*{\subsubsubsection}
{0pt}{3.25ex plus 1ex minus .2ex}{1.5ex plus .2ex}

\makeatletter
\renewcommand\paragraph{\@startsection{paragraph}{5}{\z@}%
  {3.25ex \@plus1ex \@minus.2ex}%
  {-1em}%
  {\normalfont\normalsize\bfseries}}
\renewcommand\subparagraph{\@startsection{subparagraph}{6}{\parindent}
  {3.25ex \@plus1ex \@minus .2ex}%
  {-1em}%
  {\normalfont\normalsize\bfseries}}
\def\toclevel@subsubsubsection{4}
\def\toclevel@paragraph{5}
\def\toclevel@paragraph{6}
\def\l@subsubsubsection{\@dottedtocline{4}{7em}{4em}}
\def\l@paragraph{\@dottedtocline{5}{10em}{5em}}
\def\l@subparagraph{\@dottedtocline{6}{14em}{6em}}
\@addtoreset{subsubsubsection}{section}
\@addtoreset{subsubsubsection}{subsection}
\@addtoreset{paragraph}{subsubsubsection}
\makeatother

\setcounter{secnumdepth}{6}
\setcounter{tocdepth}{6}

\author{Author}
\title{Title}
\date{2014}

\begin{document}
\tableofcontents

\section{Section 1}
\subsection{subsection 1}
\subsubsection{subsubsection 1}
\subsubsubsection{Subsubsubsection 1}
Some description here
\paragraph{paragraph 1}
Some description here
\paragraph{Paragraph 2}
Some description here
\subsubsubsection{subsubsubsection 2}
Description here
\subsubsubsection{subsubsubsection 3}
description here
\subsubsubsection{subsubsubsection 4}
description here
\paragraph{paragraph 1}
Some description here
\paragraph{paragraph 2}
some description here
\paragraph{Paragraph 3}
\subsubsubsection{subsubsubsection 5}
description here

\end{document}

Excessive levels shown in TOC