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knitr utility to convert your static code chunks into an R editor where people can experiment. Powered by DataCamp Light, a lightweight version of DataCamp's learning interface.

Installing the package

Latest released version from CRAN

install.packages("tutorial")

Latest development version from GitHub:

if(!require(devtools)) {
  install.packages("devtools")
}
devtools::install_github("datacamp/tutorial")

Getting started

Add the following chunk at the top of your R Markdown document

```{r, include=FALSE}
tutorial::go_interactive()
```

Knit your document: in RStudio, simply hit "Knit HTML", or use

rmarkdown::render("path_to_my_file", output_format = "html_document")

How it works

R vignettes, blog posts and teaching material are typically standard web pages generated with R markdown. DataCamp has developed a framework to make this static content interactive: R code chunks are converted into an R-session backed editor so readers can experiment.

Fiddles

If you render an R Markdown document like this:

---
title: "Example Document"
author: "Your name here"
output:
  html_document:
    self_contained: false
---

```{r, include=FALSE}
tutorial::go_interactive()
```

By default, `tutorial` will convert all R chunks.

```{r}
a <- 2
b <- 3

a + b
```

An HTML file results that features an in-browser R editor with a session attached to it, where you can experiment.

html_file

Notice that the option self_contained: false is used. That way, always the latest version of the DataCamp Light JS library is fetched when the document is opened. If self_contained: true, the version of the JS library at 'knit time' is baked into the HTML document. This can cause backwards compatibility issues.

Coding challenges

You can also embed coding challenges into your webpages. This group of code chunks:

```{r ex="create_a", type="pre-exercise-code"}
b <- 5
```

```{r ex="create_a", type="sample-code"}
# Create a variable a, equal to 5


# Print out a

```

```{r ex="create_a", type="solution"}
# Create a variable a, equal to 5
a <- 5

# Print out a
a
```

```{r ex="create_a", type="sct"}
test_object("a")
test_output_contains("a", incorrect_msg = "Make sure to print `a`.")
success_msg("Great!")
```

Converts to the following DataCamp Light exercise:

html_file

Vignettes

You can power your package's vignettes with DataCamp Light by adding the same line to the top of your vignette:

---
title: "Tutorial Basics"
author: "Filip Schouwenaars"
date: "`r Sys.Date()`"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Tutorial Basics}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include=FALSE}
tutorial::go_interactive()
```

_remainder of vignette omitted_

Python

You can also code up Python exercises with tutorial:

---
title: "Example Document"
author: "Your name here"
output:
  html_document:
    self_contained: false
---

```{r, include=FALSE}
tutorial::go_interactive()
```

Here's an example of a Python fiddle/

```{python}
a = 2
b = 3

print(a + b)
```