将章节细分为 A、B……，无需使用章节

Question

对于我的课程（在大学教学），我使用 TeX 文档提供每周的作业和练习，如下所示。

\documentclass{report}

\usepackage{titlesec}
\titlelabel{\thetitle~}
\titleformat{\chapter}[hang]{\color{blue}\Large\bfseries}{Exercise \thechapter\,--\,}{0sp}{\color{blue}}[]

\begin{document}
\chapter{Topic of Week 1}
\section{Task 1}
\section{Task 2}
\chapter{Topic of Week 2}
\section{Task 1}
\section{Task 2}
\end{document}

这将生成如下章节标题练习 1 - 第一周主题。现在我需要一个解决方案来将一个章节拆分为两周，也就是说，它应该导致

• 练习 1A - 第一周主题
• 练习 1B - 第一周剩余内容

因为这些\sections是我切换到的任务\section，而且\subsection整体结构应该保持不变。实际上，我想添加一个新的\chapter{Remainder of Week 1}，但不要（明显）增加章节计数器。有什么想法吗？

Answer 1

这是一个仅使用的选项titlesec：

\documentclass{report}
\usepackage{titlesec,xcolor}

\titlelabel{\thetitle~}
\titleformat{\chapter}
    [hang]
    {\color{blue}\Large\bfseries}
    {Exercise \thechapter\,--\,}
    {0sp}
    {\color{blue}}
    []

\titleclass{\splitchapter}{top}[\part]

\newcounter{splitchapter}

\renewcommand{\thesplitchapter}{\thechapter\Alph{splitchapter}}

\titleformat{\splitchapter}
    [hang]
    {\ifnum\value{splitchapter}=1\refstepcounter{chapter}\else\fi
        \color{blue}\Large\bfseries}
    {Exercise \thesplitchapter\,--\,}
    {0sp}
    {\color{blue}}
    []
    
% copied from titlesec doc
\titlespacing*{\splitchapter}{0pt}{50pt}{40pt}

% reset splitchapter counter at each chapter
\AddToHook{cmd/chapter/before}{\setcounter{splitchapter}{0}}

\begin{document}
\chapter{a chapter}
\section{abc}
\section{abc}
\splitchapter{a split chapter}
\section{abc}
\section{abc}
\splitchapter{another split chapter}
\section{abc}
\section{abc}
\chapter{another  chapter}
\section{abc}
\section{abc}
\splitchapter{split}
\section{abc}
\end{document}

Answer 2

我不确定我是否理解你的期望。也许你只是搜索\chapter*。但也许您想要类似以下内容，这需要更改类：

\documentclass{scrreprt}
\usepackage{color}
\renewcommand*{\chapterformat}{Exercise \thechapter\,--\,}
\addtokomafont{chapter}{\color{blue}}

\DeclareNewSectionCommand[% see the KOMA-Script manual for more information
  style=chapter,
  level=\chapternumdepth,% same level as chapter
  beforeskip:=chapter,% same value as of chapter
  afterskip:=chapter,% same value as of chapter
  font:=chapter,% same value as of chapter
  counterwithin=chapter,% same value as of chapter
]{subchapter}
\DeclareTOCStyleEntry[entryformat:=chapter,indent:=chapter,numwidth:=chapter,numwidth+=.5em,pagenumberformat:=chapter,beforeskip:=chapter]{chapter}{subchapter}% may be useful for the ToC; see the KOMA-Script manual for more information
\renewcommand*{\thesubchapter}{\thechapter\Alph{subchapter}}
\renewcommand*{\subchapterformat}{Exercise \thesubchapter\,--\,}

\begin{document}
\refstepcounter{chapter}% unfortunately needed, if the numbering should not be 1, 1A, 1B but 1A, 1B without a 1 before
\subchapter{Topic of Week 1}
\section{Task 1}
\section{Task 2}
\subchapter{Remainder of Week 1}
\section{Task 3}
\section{Task 4}
\chapter{Topic of Week 2}
\section{Task 1}
\section{Task 2}
\end{document}

但也许你还想使用 1A.1、1A.2、1B.1、1B.2 作为章节编号？在这种情况下，你可以使用如下代码：

\documentclass{report}
\usepackage{color}
\usepackage{titlesec}
\titlelabel{\thetitle~}
\titleformat{\chapter}[hang]{\color{blue}\Large\bfseries}{Exercise \thechapter\,--\,}{0sp}{\color{blue}}[]

\newcounter{realchapter}
\newenvironment{subtopic}{%
  \clearpage
  \refstepcounter{chapter}%
  \setcounter{realchapter}{\value{chapter}}%
  \renewcommand{\thechapter}{\therealchapter\Alph{chapter}}%
  \setcounter{chapter}{0}%
}{%
  \clearpage
}

\begin{document}
\begin{subtopic}
\chapter{Topic of Week 1}
\section{Task 1}
\section{Task 2}
\chapter{Remainder of Week 1}
\section{Task 1}
\section{Task 2}
\end{subtopic}
\chapter{Topic of Week 2}
\section{Task 1}
\section{Task 2}
\end{document}