RMarkdown ¶

RMarkdown files are a mix of R scripts and Markdown documentation. They allow us to write documents and include R code inside.

Some documentation in Markdown...

```{r}
# some code in R
"Hello, World!"
```

You can also use LaTeX for formulas: $a+b = 2$.

The equation in this sentence will be centered $$a+b = 2$$
and take a whole line.

Where to learn? 🔥

• RMarkdown Documentation
• RMarkdown Reference

Inside editors, we are able to run the embedded snippets! 🚀

Metadata ¶

We first define the header. It is used when generating a PDF or an HTML version of the .Rmd.

---
title: 'blah blah'
output: html_document
---

To generate a PDF, you can use:

---
title: 'blah blah'
author: "blah blah"
date: " optional"
output:
  pdf_document:
    fig_caption: yes
  html_document: default
fontsize: 11pt
---

```{r setup, include = FALSE}
knitr::opts_chunk$set(error = TRUE)
knitr::opts_chunk$set(cache = TRUE)
knitr::opts_chunk$set(fig.align = "center")
knitr::opts_chunk$set(echo = TRUE, results="show")
```

[your document here]

We will then write LaTeX and Markdown content as usual.

R Code Blocs ¶

Inside an editor, you can create a code block with CTRL+ALT+I. We can use {r} to configure the code block.

• {r include = FALSE}: code compiled but not shown
• {r echo = FALSE}: code compiled but the code is not shown
• {r message = FALSE}: code compiled but the result is not shown
• {r warning = FALSE}: code compiled, do not show warnings
• {r error = FALSE}: code compiled, do not show errors