# Mixed section numbering accross subsections

I would like to change from section numbering 4.3.1 to 4.3.A, and then 4.4.1 to 4.4.B, 4.4.C and then also keep it counting into the next section. such that there is a consistent count from A - Z. I couldn't find a solution so far, any thoughts?

To clarify: I want them to have the numbering of the respective subsection but the subsubsection should count without resetting (I am trying to number Exeriments across different sections)

• Are all \subsubsections to be numbered this way? Or just for Chapter 4? What \documentclass are you using? – Werner Aug 17 '17 at 14:48
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• This would just be needed for this chapter 4 and I am using \documentclass[bibtotoc,liststotoc]{scrbook}. – Oliver Ebrle Aug 17 '17 at 19:01
• @Werner Do you think this is possible? Just can't get it to work properly. – Oliver Ebrle Aug 18 '17 at 11:07

Three steps:

1. Redefine the way \thesubsection is printed:

\renewcommand{\thesubsection}{\thesection.\Alph{subsection}}


This will ensure the subsections are enumerated using A, B, C, ...

2. Skip the first subsection number for section 4.4 using

\stepcounter{subsection}

3. Restore the original \thesubsection formatting:

\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}


Here's a minimal example:

\documentclass[bibliography=totoc,listof=totoc]{scrbook}

\begin{document}

\tableofcontents

\setcounter{chapter}{3}% Just for this example

\chapter{Experiments and Results}

\section{Datasets}

\section{Optimization}

\section{High-level model}

% Change formatting of subsection counter representation
\renewcommand{\thesubsection}{\thesection.\Alph{subsection}}

\subsection{A: Deep Gaze II}

\section{Lower-level models}

% Skip typical first subsection numbering
\stepcounter{subsection}

\subsection{B: ICF}

\subsection{C: Parameterized Gabor}

\subsection{D: ICF + Parameterized Gabor}

\subsection{E: Itti \& Koch}

\subsection{F: I\& K + ICF}

% Restore typical subsection numbering/representation (if needed)
\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}

\section{Summary}

\end{document}

• Works great, thanks a lot! I wanted to include a subsubsection e.g. 4.4.E.1 which didn't work, my command: \renewcommand{\thesubsubsection}{\thesection.\Alph{subsection}.\thesubsubsection} ? – Oliver Ebrle Aug 19 '17 at 8:53
• Do subsubsections in your document have display numbers already? – Werner Aug 19 '17 at 9:43