Slidify

An R package for Creating slides from R Markdown.

Uses R Markdown.

Start a new slide with a blank line followed by three dashes (---).

---

## Title

### Bigger text

Basic text:
 - Thing 1
 - Thing 2

Big text

Basic text:

1. Thing 1
2. Thing 2

You can use all of the features you love in Rmarkdown including:

• bullets
• Italicized and bold font.

As well as numbered lists:

1. Thing 1
2. Thing 2

Animated lists:

• This is probably specific to IO2012
• Point 2

Column 1  | Column 2
----------|---------
Foo       | Bar
Blah      | Blah
Bing      | Bang

Every deck starts with YAML to specify the basics.

title       : Slidify 
subtitle    : Presentations from R Markdown
author      : Robert J. Walls
job         : University of Massachusetts
framework   : io2012        # {io2012, html5slides, shower, dzslides, ...}
highlighter : highlight.js  # {highlight.js, prettify, highlight}
hitheme     : tomorrow      # 
widgets     : [mathjax, bootstrap]     # {mathjax, quiz, bootstrap}
mode        : selfcontained # {standalone, draft}
biglogo     : robertsrobot.png
logo        : umass.png

library(plyr)
library(ggplot2)

df <- diamonds[seq(1, 5), ]
df <- with(df, cbind(price, carat, cut, clarity))

# Make the header
header <- paste(colnames(df), collapse = " | ")
dashline <- paste(rep(c("---"), length(colnames(df))), collapse = " | ")

# Add the data
data <- aaply(df, 1, paste, collapse = " | ")

It is actually running this code.

cat(header, dashline, data, sep = "\n")

Make sure to set results='asis'.

library(ggplot2)
ggplot(diamonds, aes(carat, price)) + geom_hex()

Use echo=FALSE to hide the code block on your slide.

Write equations like you would in LaTeX.

Equations can be written inline, \(\frac{1}{n} \sum_{i=i}^{n} x_{i}\), such as this. Or if you want to get fancy:

\[ H(X)=-\sum_{i}{P(x_i) log_b P(x_i)} \]

$\frac{1}{n} \sum_{i=i}^{n} x_{i}$
$$ H(X)=-\sum_{i}{P(x_i) log_b P(x_i)} $$

In the starting YAML, make sure to include

widgets : [mathjax]

Use fenced code blocks to render code with syntax highlighting.

```python
...CODE!
```

def hello():
  '''
  Such a boring function
  '''
  print 'hi!'

if __name__ == '__main__':
  hello()

You have to use Hadley's devtools package to download and install Slidify from Github.

library(devtools)
install_github('slidify', 'ramnathv')
install_github('slidifyLibraries', 'ramnathv')

It is simple to create a new presentation.

library(slidify)

#Create a new presentation called 'mydeck'
author('mydeck')

Slidify does the setup work for you (including creating the github repo). You just need to edit the index.Rmd file!

Sharing your handiwork is easy.

# Generate the Deck
slidify('index.Rmd')

# Publish it to github
publish(user='rjwalls', repo='SlidifyTest', host='github')

Puts the presentation at http://rjwalls.github.com/SlidifyTest. Note that you need to setup your Github SSH keys.

Can also use Rpubs or Dropbox.

title       : Slidify 
subtitle    : Presentations from R Markdown
author      : Robert J. Walls
job         : University of Massachusetts
framework   : io2012        # {io2012, html5slides, shower, dzslides, ...}
highlighter : highlight.js  # {highlight.js, prettify, highlight}
hitheme     : tomorrow      # 
widgets     : [mathjax, bootstrap]     # {mathjax, quiz, bootstrap}
mode        : selfcontained # {standalone, draft}
biglogo     : robertsrobot.png
logo        : umass.png

The default slide framework is io2012 from Google's 2012 I/O developer conference.

Adds some nice presenter features

• Pressing 'p' toggles speaker notes (if they're on the current slide ((buggy)))
• Pressing 'f' toggles fullscreen viewing
• Pressing 'w' toggles widescreen
• Pressing 'o' toggles overview mode
• Pressing 'ESC' toggles off these goodies

Append ?presentme=true to the presentation url to get the presenter view. Use ?presentme=false to disable presenter mode.

Slide level metadata are specified as key:value pairs. Commonly specified metadata like id, class and layout can also be identified by prefixing with punctuation marks #, . and & respectively.

--- &vcenter

--- .segue .dark

--- .segue .quote .dark, bg:url(allyourbase.jpg)

This slide does not have two columns, but it should.

Quick and easy way to create presentations, but it's not quite ready to replace Keynote.

Lacking:

• Animations
• Presenter View
• Spellcheck

Useful Links

• R Markdown Examples
• Slidify Homepage
• I/O 2012 Template
• iquiz: A quiz widget for slidify
• Ramnath Vaidyanathan's Github page