Using RMarkdown

Last updated on 2025-07-01 | Edit this page

Overview

Questions

  • How do you write a lesson using R Markdown and sandpaper?

Objectives

  • Explain how to use markdown with the new lesson template
  • Demonstrate how to include pieces of code, figures, and nested challenge blocks

Introduction

This is lesson, created follwing The Carpentries Workbench, is meant to be an introduction to learning how to work with timeseries datasets in R.

There are three sections that will appear at the start of every lesson:

  1. questions are displayed at the beginning of the episode to prime the learner for the content.
  2. objectives are the learning objectives for an episode displayed with the questions.
  3. keypoints are displayed at the end of the episode to reinforce the objectives.

To successfully participate in this course, we ask that participants meet the following prerequisites:

  • Have an understanding of how file explorer works - creating folders, how to access and download files and moving them into the approriate folder (uses daily)
  • Be able to use and download files from internet (uses daily)
  • Be able to open, use basic functions, and edit in excel (uses weekly - monthly)
  • Some very basic statistical knowledge (what is a mean, median, boxplot, distribution etc.) (any previous use)
  • An overall understanding of why timeseries data is important (any previous use)
  • Basic R: they have opened it, made projects, used basic functions (View, summary, mean, sd, etc.) and can load a dataset and install packages (any previous use)
  • R coding: Base R: understanding of aggregrate() and some experience with tidyverse (has used at least twice before)

Challenge 1: Can you do it?

What is the output of this command?

R 

paste("This", "new", "lesson", "looks", "good")

OUTPUT 

[1] "This new lesson looks good"

Challenge 2: how do you nest solutions within challenge blocks?

You can add a line with at least three colons and a solution tag.

Figures

You can also include figures generated from R Markdown:

R 

pie(
  c(Sky = 78, "Sunny side of pyramid" = 17, "Shady side of pyramid" = 5), 
  init.angle = 315, 
  col = c("deepskyblue", "yellow", "yellow3"), 
  border = FALSE
)
pie chart illusion of a pyramid
Sun arise each and every morning

Or you can use standard markdown for static figures with the following syntax:

![optional caption that appears below the figure](figure url){alt='alt text for accessibility purposes'}

Blue Carpentries hex person logo with no text.
You belong in The Carpentries!

Callout

Callout sections can highlight information.

They are sometimes used to emphasise particularly important points but are also used in some lessons to present “asides”: content that is not central to the narrative of the lesson, e.g. by providing the answer to a commonly-asked question.

Math

One of our episodes contains \(\LaTeX\) equations when describing how to create dynamic reports with {knitr}, so we now use mathjax to describe this:

$\alpha = \dfrac{1}{(1 - \beta)^2}$ becomes: \(\alpha = \dfrac{1}{(1 - \beta)^2}\)

Cool, right?

Key Points

  • Use .md files for episodes when you want static content
  • Use .Rmd files for episodes when you need to generate output
  • Run sandpaper::check_lesson() to identify any issues with your lesson
  • Run sandpaper::build_lesson() to preview your lesson locally