How to create numbered excercises at the end of chapters? [PDF & HTML]

[friendly]

Description

[Env: Quarto 1.7.29; RStudio 2024.09.0 Build 375]

In am older book written as .Rnw, I defined exercises as a new form of a list environment, used
as \begin{Exercises} ... \end{Exercises} with each exercise introduced as an \exercise item.

Below it the LaTeX code and an example.

The important thing is that these are automatically numbered within each chapter, and they can be referenced.

How can I achieve something similar in Quarto giving HTML or PDF outout? Can I just use this LaTeX? Is there anything like a custom list environment in Quarto?

LaTeX code

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Define new list type for exercises
% from: http://tex.stackexchange.com/questions/196199/exercise-list-using-enumitem-how-control-indentation-and-labeling-of-sublists
% by: Daniel Wunderlich
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
\usepackage{enumitem}      % this should be loaded in book.Rnw
%
\newlist{Exercises}{enumerate}{2}
% set list style parameters
\setlist[Exercises]{%
  label=\textbf{Exercise \thechapter.\arabic*}~,  % Label: Exercise Chapter.exercise
  ref=\thechapter.\arabic*, % References: Chapter.exercise (important!)
  align=left,               % Left align labels
  labelindent=0pt,          % No space betw. margin of list and label
  leftmargin=0pt,           % No space betw. margin of list and following lines
  itemindent=!,             % Indention of item computed automatically
  itemsep=3pt,
}

\newcommand{\exercise}{%
  \item\label{lab:\arabic{chapter}.\arabic{Exercisesi}}%      % Append label to item
  \setlist[enumerate, 1]{label=(\alph*),itemsep=0pt}          % Label for subexercises, but only within an exercise
}

Example
Here is an example of use:

\begin{Exercises}

\exercise The packages \pkg{vcd} and \pkg{vcdExtra} contain many data sets with some
examples of analysis and graphical display.  The goal of this exercise is to
familiarize yourself with these resources.

You can get a brief summary of
these using the function \func{datasets} from \pkg{vcdExtra}.  Use the following to get a list of
these with some characteristics and titles.
<<datasets>>=
ds <- datasets(package = c("vcd", "vcdExtra"))
str(ds, vec.len = 2)
@
  \begin{enumerate*}
    \item How many data sets are there altogether?  How many are there in each package?
    \item Make a tabular display of the frequencies by \code{Package} and \code{class}.
    \item Choose one or two data sets from this list, and examine their help files
    (e.g., \code{help(Arthritis)} or \code{?Arthritis}).  You can use, e.g.,
    \code{example(Arthritis)} to run the \R code for a given example.
  \end{enumerate*}

\exercise For each of the following data sets in the \Rpackage{vcdExtra}, identify which are response variable(s)
and which are explanatory. For factor variables, which are unordered (nominal) and which
should be treated as ordered? Write a sentence or two describing substantitive questions of interest for analysis
of the data. (\emph{Hint}: use 
\code{data(foo, package="vcdExtra")} to load, and \code{str(foo)}, 
  \code{help(foo)} to examine data set \code{foo}.)
  \begin{enumerate*}
    \item Abortion opinion data: \data{Abortion}
    \item Caesarian Births: \data{Caesar}
    \item Dayton Survey: \data{DaytonSurvey}
    \item Minnesota High School Graduates: \data{Hoyt}
  \end{enumerate*}

\end{Exercises}
```

It produces output like this:

![image](https://github.com/user-attachments/assets/fc5bb93c-8323-4274-978a-ff90d4008470)

[mcanouil]

Using the exercises prefix as described in the documentation: https://quarto.org/docs/authoring/cross-references.html#theorems-and-proofs

::: {#exr-one}
This is the problem statement.
:::

[friendly]

That's great! Exactly what I was looking for. (It's been a while since I read that doc.)