將「第 N 章」加入到除第一章之外的所有章節

Question

建立在這例如，將章節新增到每個章節標題，我如何修改程式碼來做到這一點除了引言和最後/結論章節（但仍保留目錄編號）？

\documentclass{tufte-book}
\usepackage{lipsum}

\makeatletter
\titleformat{\chapter}%
  [display]% shape
  {\relax\ifthenelse{\NOT\boolean{@tufte@symmetric}}{\begin{fullwidth}}{}}% format applied to label+text
  {\itshape\huge\chaptertitlename~\thechapter}% label
  {0pt}% horizontal separation between label and title body
  {\huge\rmfamily\itshape}% before the title body
  [\ifthenelse{\NOT\boolean{@tufte@symmetric}}{\end{fullwidth}}{}]% after the title body
\makeatother
\setcounter{secnumdepth}{1}

\begin{document}

\chapter{Introduction}
\lipsum[1]
\chapter{A substantive chapter}
\lipsum[2]
\end{document}

編輯：我對靈活的解決方案感興趣 - 允許我將引言和結論的編號方式與其他章節相同 - 允許我讓引言和結論不編號，但仍然出現在目錄中。

Answer 1

只要更改是在群組內進行的，它們只會影響您想要的章節，並且您可以根據需要靈活地更改其他章節。

\documentclass{tufte-book}
\usepackage{lipsum}

\makeatletter
\newcommand{\mychap}{%
\titleformat{\chapter}%
  [display]% shape
  {\relax\ifthenelse{\NOT\boolean{@tufte@symmetric}}{\begin{fullwidth}}{}}% format applied to label+text
  {\itshape\huge\chaptertitlename~\thechapter}% label
  {0pt}% horizontal separation between label and title body
  {\huge\rmfamily\itshape}% before the title body
  [\ifthenelse{\NOT\boolean{@tufte@symmetric}}{\end{fullwidth}}{}]% after the title body
}
\makeatother
\setcounter{secnumdepth}{1}

\begin{document}

\chapter{Introduction}
\lipsum[1]

\begingroup
\mychap%
\chapter{A substantive chapter}
\lipsum[2]
\chapter{Another chapter}
\lipsum[1]
\endgroup

\chapter{Conclusions}
\lipsum[1]

\end{document}