Xaringan R

  

Introduction

Moonreader: An R Markdown output format for remark.js slides Description. This output format produces an HTML file that contains the Markdown source (knitted from R Markdown) and JavaScript code to render slides. Tsukuyomi is an alias of moonreader.

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There are many ways to create presentations with R Markdown. The package xaringan build by Rstudio employee Yihui Xie is one possiblity to create impressionable HTML5 slides that really stand out. It’s beautiful layout and concise and tidy coding structure makes it a charm to work with. It’s build on the remark.js library and if you want to learn more about it you can do this here. Here are some example slides by the creator which also serves as an introduction:

Are you ready to become a presentation ninja?

Xaringan

Installation

There is multiple ways to install packages in R. One safe bet is to install the xaringan package from CRAN, as follows:

Sometimes the versions on CRAN are somewhat older. If you are interested in the newest version, one option is to always look for the related (GitHub) repository. To install it from here you need to first install the devtools package in case you don’t have it and then use install_github(“yihui/xaringan”) to install the package from GitHub.

To create a xaringan presentation, you create an R Markdown document with the xaringan::moon_reader output format. From within RStudio, it is easy to get started. First click on the New File icon below File and then on R Markdown:

Next select “From Template” then Ninja Presentation, and you will see an R Markdown example.

Press the Knit button to compile it.

Rug

Basics

As is the norm with any R Markdown document, there is a yaml header at the beginning which specifies some meta data. Here you can put in the title of the presentation, authors and more. This will configure the title slide. Much more can be done here to customize how your slides will look like but for now we stick with the basics. Here is how your yaml header could look like:

This gives us the following title slide:

So how are slides created with xaringan? Easy!

Overall, regular R Markdown rules apply so you can use this for italic and two stars for bold for example or even your most complicated LaTeX equations.

The # before a line of text creates a header for the slide and the more hashtags you add the smaller is the header

Slides are then seperated with three lines ---. For the first slide you don’t need to do this because it is already implied after the yaml header.

If we wanted to let elements on the slides appear with a click, we seperate them with two lines -- like this.

Lastly, if we want to have more space between the elements on a slide we can use the html tag <br>.

You could start with something like this:

This is how this would look like:

This looks awesome already!

Formatting Slides

Let’s say we want to play around a bit with the format of our slides. There are some build in functions that lets us do exactly that.

Fcc

We specify the following code at the beginning of a slide:

class: inverse, center, middle

This will inverse the color (here: black) center the elements horizontally (center) and vertically (middle) on that slide. This makes for some pretty cool transition slides.

Here is an example:

Which produces the following slide:

Adding a GIF or an Image

You can also add GIFs or images to your slides. It’s done exactly in the same way as you would with a normal R Markdown document. Here is an example:

using themes and xaringanthemer

We’ve already come a long way creating nice xaringan slides. If we wanted to customize the theme of the presentation, xaringan comes with some build-in color schemes that you can try out.

Here is one of them. Just add the following line in your YAML header and you are good to go:

This looks like this:

Here is a list of themes:

  • metropolis
  • hygge
  • rladies

If you want to create your own themes I can recommend the xaringanthemer package:

Exporting the presentation to .pdf

The output format of xaringan is html. However, if you want a .pdf file you could just simply open the slides in your favorite web browser and print them to .pdf. This seems to be the easiest version to do it.

What Now?

I hope you enjoyed this little tutorial!

Here are some more examples of beautiful xaringan slides that can serve as your inspiration:

You want to add animated transitions? Well, here’s an implementation of that:

Lastly, a wiki helps to implement more advanced options. Be sure to check it out at some point:

Description

This output format produces an HTML file that contains the Markdown source(knitted from R Markdown) and JavaScript code to render slides.tsukuyomi() is an alias of moon_reader().

Usage

Arguments

A vector of CSS file paths. Two default CSS files(default.css and default-fonts.css) are provided in thispackage, which was borrowed from https://remarkjs.com. If thecharacter vector css contains a value that does not end with.css, it is supposed to be a built-in CSS file in this package,e.g., for css = c('default', 'extra.css')), it meansdefault.css in this package and a user-provided extra.css. Tofind out all built-in CSS files, use xaringan:::list_css().

Whether to produce a self-contained HTML file byembedding all external resources into the HTML file. See the ‘Note’section below.

Whether to generate a title slide automatically using the YAMLmetadata of the R Markdown document (if FALSE, you should write thetitle slide by yourself).

Whether to insert theMustache Karl (TM) randomly in the slides. TRUE means insert his picture onone slide, and if you want him to be on multiple slides, set yolo toa positive integer or a percentage (e.g. 0.3 means 30% of your slides willbe the Mustache Karl). Alternatively, yolo can also be a list of theform list(times = n, img = path): n is the number of times toshow an image, and path is the path to an image (by default, it isKarl).

A path to the remark.js library (can be either local orremote). Please note that if you use the default remote latest version ofremark.js, your slides will not work when you do not have Internet access.They might also be broken after a newer version of remark.js is released.If these issues concern you, you should download remark.js locally (e.g.,via summon_remark()), and use the local version instead.

(Nature transformation) A list of configurations to be passedto remark.create(), e.g. list(ratio = '16:9', navigation =list(click = TRUE)); seehttps://github.com/gnab/remark/wiki/Configuration. Besides theoptions provided by remark.js, you can also set autoplay to a number(the number of milliseconds) so the slides will be played everyautoplay milliseconds; alternatively, autoplay can be a listof the form list(interval = N, loop = TRUE), so the slides will goto the next page every N milliseconds, and optionally go back to thefirst page to restart the play when loop = TRUE. You can also setcountdown to a number (the number of milliseconds) to include acountdown timer on each slide. If using autoplay, you can optionallyset countdown to TRUE to include a countdown equal toautoplay. To alter the set of classes applied to the title slide,you can optionally set titleSlideClass to a vector of classes; thedefault is c('center', 'middle', 'inverse').

Xaringan R House

For tsukuyomi(), arguments passed tomoon_reader(); for moon_reader(), arguments passed tormarkdown::html_document().

Details

Tsukuyomi is a genjutsu to trap the target in an illusion on eye contact.

If you are unfamiliar with CSS, please see thexaringan wiki on Githubproviding CSS slide modification examples.

Xaringan R Themes

References

Sharingan Remix

Examples