How to use a LaTeX package with R/exams?

Question

I am using exams2moodle() to create exam quizzes. I would like to use some math symbols which require the LaTeX package amssymb. How should I proce

Answer 1

In general, you input your symbols into either .Rmd or .Rnw and you can have it rendered with any available engine (e.g. pandoc, mathjax, knitr, etc).

install.packages("exams")

require(exams)

xWeave is called on each exercise file and creates LaTeX code

elearn_exam <- c("swisscapital.Rmd", "deriv.Rmd", "ttest.Rmd",
                 "boxplots.Rmd", "function.Rmd", "lm.Rmd", "fourfold2.Rmd")

set.seed(2020-04-16)

exams2moodle() produces an XML file that may be uploaded into Moodle

It goes from LaTeX to HTML then HTML to XML

exams2moodle(elearn_exam, n = 3, name = "R-exams")

To add custom LaTeX packages you can modify the preamble as per the answers in this post, i.e. \usepackage

As described in the linked post, that can either be done direct, i.e.

---
title: "Title"
author: "Me"
header-includes:
   - \usepackage{mypackage}
output:
    pdf_document
---

or via a mystyles.sty file in the same directory.