[Tex/LaTex] How to not display chapter number in section number (titlesec)

numberingsectioningtitlesec

I'm using titlesec to manipulate title and section and other.
Here is what I'm using:

\titleformat{\chapter}
    [frame]
    {\normalfont}
    {\filright \footnotesize \enspace LP \thechapter \enspace}
    {6pt}
    {\Large \bfseries \filcenter }

\titleformat{\section}%
  [hang]
  {\Large\bfseries\color{bleu}}
  {\thesection}
  {1em}
  {}

But in my PDF the section are numbered as 1.1 then 1.2 etc…
I would like to suppress the chapter number and only have 1 section 1; 2 section 2 etc…

How can I do that while keeping the rest?

Best Answer

By default, the section numbering would be done on a per-chapter basis with the chapter number included in the representation. In LaTeX terms, this is done using

\renewcommand{\thesection}{\thechapter.\arabic{section}}

In the above construction, \thesection is the way the section number is presented, and includes \thechapter (the way the chapter number is presented). So to remove the chapter from the section number, add

\renewcommand{\thesection}{\arabic{section}}

to your preamble.

Related Solutions

[Tex/LaTex] Adding section number after section title with titlesec package

You need to use the explicit package option with titlesec. It enables you to "explicitly" state where the section title is printed using #1 to denote the title. In this case, we place the title code in the <before code> section of \titleformat:

enter image description here

\documentclass{article}
\usepackage[compact,explicit]{titlesec}% http://ctan.org/pkg/titlesec
\begin{document}
\titleformat{\section}[runin]{\large\bfseries}{}{0pt}{#1\quad\thesection}
\section{First section}
\section{Second section}
\section{Last section}
\end{document}

The general structure of title formatting provided by titlesec is via

\titleformat{<command>}[<shape>]{<format>}{<label>}{<sep>}{<before-code>}[<after-code>]

Since the <label> is no longer needed, it is explicitly inserted in <before-code> together with (after) the section title #1. I've placed \quad between the two components, but you can modify this to your like, using (say) \hspace{<len>} where <len> is any recognized (La)TeX length.

I kept your other settings for the sake of convenience since you didn't provide a complete MWE.

[Tex/LaTex] Chapter titles using titlesec

Since the lists (ToC, LoF, LoT), the bibliography and index usually use \chapter* to format the heading in the document, you can simply use another \titleformat command for the numberless chapters:

\documentclass{book}

\usepackage{titlesec}
\titleformat{\chapter}[display]
  {\normalfont\bfseries\filcenter}{\LARGE\thechapter}{1ex}
  {\titlerule[2pt]\vspace{2ex}}[\vspace{1ex}{\titlerule[2pt]}]
\titleformat{name=\chapter,numberless}[display]
  {\normalfont\LARGE\bfseries\filcenter}{}{1ex}
  {\vspace{2ex}}[\vspace{1ex}]

\begin{document}

\tableofcontents
\chapter{The real numbers}

\end{document}

An image of the ToC

enter image description here

and another one, of a numbered chapter:

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Adding section number after section title with titlesec package

[Tex/LaTex] Chapter titles using titlesec

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