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I'm working on a "report" which consists of the solutions for several assignments which are structured into "topics" and "parts".
I'm quite happy with the result I got by simply using sections (with title equal to topic name) and I redefined the subsection command with \renewcommand{\thesubsection}{Part \arabic{subsection}}. Which works fine.
But right now I would like to merge the answer of two parts into one. Is it possible to start one subsection as "Part 2&3"?

\documentclass[11pt,a4paper]{article}
\renewcommand{\thesubsection}{Part \arabic{subsection}}

\begin{document}
\section{Polytropes}
The code used for the computations in this section can be seen in Appendix 1.
\subsection{}
\textbf{ASSIGNMENT}\\
my solution.
\subsection{and 3} %this obviously horrible due to spacing, referencing, counter, etc. 
\textbf{ASSIGNMENT of part 2 and 3}\\
my solution.
\end{document}
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    – R. N
    Commented Dec 22, 2020 at 14:19

1 Answer 1

Reset to default
2

I'd avoid overloading \subsection and define a proper command based on it. In the code, instead of a numbered section, I use \subsection* and pass the expected title, setting \@currentlabel, which is responsible for the correct cross reference.

\documentclass[11pt,a4paper]{article}

\makeatletter
\newcommand{\documentpart}{%
  \stepcounter{subsection}%
  \def\@currentlabel{Part \arabic{subsection}}%
  \subsection*{\@currentlabel}%
  \addcontentsline{toc}{subsection}{\@currentlabel}%
}
\newcommand{\extradocumentpart}{%
  \stepcounter{subsection}%
  \def\@currentlabel{Part \@arabic{\c@subsection} and \@arabic{\numexpr\c@subsection+1\relax}}%
  \subsection*{\@currentlabel}
  \addcontentsline{toc}{subsection}{\@currentlabel}%
  \stepcounter{subsection}%
}
\makeatother

\begin{document}

\tableofcontents

\section{Polytropes}

The code used for the computations in this section can be seen in Appendix~1.

\documentpart\label{test1}
\textbf{ASSIGNMENT of \ref{test1}}\\
my solution.

\extradocumentpart\label{test2}
\textbf{ASSIGNMENT of \ref{test2}}\\
my solution.

\documentpart\label{test3}
\textbf{ASSIGNMENT of \ref{test3}}\\
my solution.

\end{document}

enter image description here

If you also want actual titles

\documentclass[11pt,a4paper]{article}

\makeatletter
\newcommand{\documentpart}[1]{%
  \stepcounter{subsection}%
  \def\@currentlabel{Part \arabic{subsection}}%
  \subsection*{\@currentlabel\quad#1}%
  \addcontentsline{toc}{subsection}{\@currentlabel\quad#1}%
}
\newcommand{\extradocumentpart}[1]{%
  \stepcounter{subsection}%
  \def\@currentlabel{Part \@arabic{\c@subsection} and \@arabic{\numexpr\c@subsection+1\relax}}%
  \subsection*{\@currentlabel\quad#1}
  \addcontentsline{toc}{subsection}{\@currentlabel\quad#1}%
  \stepcounter{subsection}%
}
\makeatother

\begin{document}

\tableofcontents

\section{Polytropes}

The code used for the computations in this section can be seen in Appendix~1.

\documentpart{Some title}\label{test1}
\textbf{ASSIGNMENT of \ref{test1}}\\
my solution.

\extradocumentpart{Some title}\label{test2}
\textbf{ASSIGNMENT of \ref{test2}}\\
my solution.

\documentpart{Some title}\label{test3}
\textbf{ASSIGNMENT of \ref{test3}}\\
my solution.

\end{document}

enter image description here

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8
  • 1
    Thank you very much! This definitely works! There is a small peculiarity though: in the toc, the "dots" seem to ignore the numbers (in this case "2 and 3" has the dots just underneath it)
    – ahermann
    Commented Dec 22, 2020 at 21:59
  • @Andrej Revamped code, now there is no problem with the toc.
    – egreg
    Commented Dec 22, 2020 at 22:35
  • Thank you very much!!! (edit because I typed my answer while you already enhanced the code) Is it possible to add the possibility of a title to the \documentpart command?
    – ahermann
    Commented Dec 22, 2020 at 22:36
  • changing it to \newcommand{\documentpart}[1]{% \stepcounter{subsection}% \def\@currentlabel{Part \arabic{subsection}\hspace{1em}#1} allows to add a title, but then the referencing gets messy as it also includes the title into the reference...
    – ahermann
    Commented Dec 22, 2020 at 23:00
  • @Andrej I can't read your mind, sorry. Did you speak about titles?
    – egreg
    Commented Dec 22, 2020 at 23:15

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