Customise numbering in order to subdivide a single section into two parts

articlenumberingsectioning

I have an article class document. I am trying to divide a "section" into two parts such that a letter is added to the section number for the different parts. By "dividing" I mean visually, programming-wise I guess it is just customising the numbering. My aim is to have sections numbered in the following way:

1 Some Section

1.1 Some Subsection

2A Some Section

2A.1 Some Subsection

2A.1.1 Some Subsubsection

2B Some Section

2B.1 Some Subsection

2B.2 Some Subsection

3 Some Section

3.1 Some Subsection

I think the idea would be to create a new \section-like command, or set of commands, that allows the creation of a new section with a custom letter attached to it (or with something that tracks if the previous section has a letter). However, this command should not affect the usual \section command as I still want to be able to use the usual numbering before and after the subdivided section (or sections).

I have tried to implement the case where I divide a single section into two (A and B) using the approach of the accepted answer in this question. However, this answer is thought for a document where all sections are divided into A and B, while I just want to divide one section. Therefore, after using the new command they create (\sectionB), if I use \section again a letter is still added to the numbering.

Any help would be much appreciated.

Best Answer

You could enclose the changes in the section counters in an environment to be used like amsmath's subequations environment. I think the following example should do what you wanted.

\documentclass{article}
\newcounter{outersection}
\newenvironment{dividedsection}{%
    \let\oldthesection\thesection
    \setcounter{outersection}{\value{section}}
    \stepcounter{outersection}
    \setcounter{section}{0}
    \renewcommand{\thesection}{\arabic{outersection}\Alph{section}}
}{%
    \setcounter{section}{\value{outersection}}
    \renewcommand{\thesection}{\oldthesection}
}
\begin{document}
\section{A section}
\begin{dividedsection}
\section{Half of a divided section}
\subsection{A subsection}
\subsection{Another subsection}
\section{The other half}
\end{dividedsection}
\section{Another section}
\end{document}

Related Solutions

[Tex/LaTex] How to add an extra level of sections with headings below \subsubsection

You can use the titlesec package to change the way \paragraph formats the titles and set the secnumdepth counter to four to obtain numbering for the paragraphs:

\documentclass{article}
\usepackage{titlesec}

\setcounter{secnumdepth}{4}

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

\begin{document}

\section{Test Section}
test
\subsection{Test Subsection}
test
\subsubsection{Test Subsubsection}
test
\paragraph{Test Modified Paragraph}
test

\end{document}

enter image description here

If you want to define a new sectioning command, you can take a look at Defining custom sectioning commands.

If you want to define a fresh new sectional unit below \subsubsection, but above \paragraph, then you will have to do considerably more work: a new counter has to be created and its representation has to be appropriately defined; the sectional units \paragraph and \subparagraph will also have to be redefined, as well as they corresponding \l@... commands (controlling how the will be typeset in the ToC if the tocdepth value is increased); also, the toclevel (for eventual bookmarks) will have to be considered.

Here's an example showing how to obtain this new sectional unit giving you now the option to use \part, \section, \subsection, \subsubsection, \subsubsubsection, \paragraph, and \subparagraph:

\documentclass{article}
\usepackage{titlesec}
\usepackage{hyperref}

\titleclass{\subsubsubsection}{straight}[\subsection]

\newcounter{subsubsubsection}[subsubsection]
\renewcommand\thesubsubsubsection{\thesubsubsection.\arabic{subsubsubsection}}
\renewcommand\theparagraph{\thesubsubsubsection.\arabic{paragraph}} % optional; useful if paragraphs are to be numbered

\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}}
\makeatother

\setcounter{secnumdepth}{4}
\setcounter{tocdepth}{4}

\begin{document}

\tableofcontents
\section{Test Section}
test
\subsection{Test Subsection}
test
\subsubsection{Test Subsubsection}
test
\subsubsubsection{Test Subsubsubsection}
test
\paragraph{Test Paragraph}
test
\subparagraph{Test Subparagraph}
test

\end{document}

enter image description here

[Tex/LaTex] How to change page numbering and section numbering

Here's the scheme I propose; the kantlipsum package is just to produce mock text.

\documentclass[11pt]{scrbook}
\usepackage[a4paper,left=2.5cm,right=2.5cm,top=2.5cm,bottom= 3.2cm]{geometry}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english,ngerman]{babel}

\usepackage{lmodern}

\usepackage{graphicx}

\usepackage[colorlinks=false,pdfborder={0 0 0}]{hyperref}

\usepackage{kantlipsum}% for mock text


\begin{document}

\pagenumbering{alph}
\pagestyle{empty}

%\input{./Title.tex}
%\input{./blabla.tex}

\tableofcontents

\frontmatter
\pagestyle{headings}

\begingroup

\renewcommand{\cleardoublepage}{}
%\input{./Abstract.tex}
\chapter{\abstractname}
\kant[1]

\begin{otherlanguage}{english}
\chapter{\abstractname}
\kant[2]
\end{otherlanguage}

\endgroup

\mainmatter

%\input{./Introduction.tex}
%\input{./MyStuff.tex}

\chapter{Introduktion}
\kant[3]

\section{Title}
\kant



\end{document}

I use the fact that chapters in the front matter are not numbered and use a trick for getting two chapters in the same page, which assumes that your two abstracts fit.

However my opinion is that all pages should have a number, even if it doesn't appear. So the abstracts will be on page, say vii (title page, back of title page, dedication, back of dedication, table of contents in two pages).

Best Answer

Related Solutions

[Tex/LaTex] How to add an extra level of sections with headings below \subsubsection

[Tex/LaTex] How to change page numbering and section numbering

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