The HTML Presentation Framework

Created by Hakim El Hattab / @hakimel

Hello There

reveal.js enables you to create beautiful interactive slide decks using HTML. This presentation will show you examples of what it can do.

Vertical Slides

Slides can be nested inside of each other.

Use the Space key to navigate through all slides.

Down arrow

Basement Level 1

Nested slides are useful for adding additional detail underneath a high level horizontal slide.

Basement Level 2

That's it, time to go back up.

Up arrow


Not a coder? Not a problem. There's a fully-featured visual editor for authoring these, try it out at

Point of View

Press ESC to enter the slide overview.

Hold down alt and click on any element to zoom in on it using zoom.js. Alt + click anywhere to zoom back out.

Touch Optimized

Presentations look great on touch devices, like mobile phones and tablets. Simply swipe through your slides.


Hit the next arrow...

... to step through ...

... a fragmented slide.

Fragment Styles

There's different types of fragments, like:








Transition Styles

You can select from different transitions, like:
None - Fade - Slide - Convex - Concave - Zoom


reveal.js comes with a few themes built in:
Black (default) - White - League - Sky - Beige - Simple
Serif - Night - Moon - Solarized

Slide Backgrounds

Set data-background="#dddddd" on a slide to change the background color. All CSS color formats are supported.

Down arrow

Image Backgrounds

<section data-background="image.png">

Tiled Backgrounds

<section data-background="image.png" data-background-repeat="repeat" data-background-size="100px">

Video Backgrounds

<section data-background-video="video.mp4,video.webm">

Background Transitions

Different background transitions are available via the backgroundTransition option. This one's called "zoom".

Reveal.configure({ backgroundTransition: 'zoom' })

Background Transitions

You can override background transitions per-slide.

<section data-background-transition="zoom">

Pretty Code

function linkify( selector ) {
  if( supports3DTransforms ) {

    var nodes = document.querySelectorAll( selector );

    for( var i = 0, len = nodes.length; i < len; i++ ) {
      var node = nodes[i];

      if( !node.className ) {
        node.className += ' roll';

Code syntax highlighting courtesy of highlight.js.

Marvelous List

  • No order here
  • Or here
  • Or here
  • Or here

Fantastic Ordered List

  1. One is smaller than...
  2. Two is smaller than...
  3. Three!

Tabular Tables

Item Value Quantity
Apples $1 7
Lemonade $2 18
Bread $3 2

Clever Quotes

These guys come in two forms, inline: “The nice thing about standards is that there are so many to choose from” and block:

“For years there has been a theory that millions of monkeys typing at random on millions of typewriters would reproduce the entire works of Shakespeare. The Internet has proven this theory to be untrue.”

Intergalactic Interconnections

You can link between slides internally, like this.

Speaker View

There's a speaker view. It includes a timer, preview of the upcoming slide as well as your speaker notes.

Press the S key to try it out.

Export to PDF

Presentations can be exported to PDF, here's an example:

Global State

Set data-state="something" on a slide and "something" will be added as a class to the document element when the slide is open. This lets you apply broader style changes, like switching the page background.

State Events

Additionally custom events can be triggered on a per slide basis by binding to the data-state name.

Reveal.addEventListener( 'customevent', function() {
	console.log( '"customevent" has fired' );
} );

Take a Moment

Press B or . on your keyboard to pause the presentation. This is helpful when you're on stage and want to take distracting slides off the screen.

Much more


- Try the online editor
- Source code & documentation

Predict Weather with



April 10, 2015


Lightning Talk


PyCon 2015

Hobson Lane

Hidden Layer Weights





$ pip install pug-ann
>>> df ='PDX')

Batteries (data) included!

pug scrapes URLs like...

Daily weather for any US location:

into a pandas.DataFrame

pybrain.Network pug.ann.util.build_neural_net():

def build_neural_net(N_inp=7, N_hid=2):
    nn = pb.structure.FeedForwardNetwork()

    # layers
    inlay = pb.structure.LinearLayer(N_inp, name='input')
    outlay = pb.structure.LinearLayer(1, name='output')

    # connections
    if N_hid:
        hidlay = pb.structure.LinearLayer(N_hid, name='hidden')
        in_to_hid = pb.structure.FullConnection(inlay, hidlay)
        hid_to_out = pb.structure.FullConnection(hidlay, outlay)
        in_to_out = pb.structure.FullConnection(inlay, outlay)

    return nn
def pybrain_dataset_from_dataframe(df, 
        inputs=['Max Humidity', ' Mean Humidity', ' Min Humidity'],
        outputs=['Max TemperatureF']):
    N_inp = len(inputs)
    N_out = len(outputs)

    ds = pb.datasets.SupervisedDataSet(N_inp, N_out)
    for sample in df[inputs + outputs].values:
        ds.addSample(sample[:N_inp], sample[N_inp:])
    return ds

pybrain.Dataset pug.ann.util.pybrain_dataset_from_dataframe():

from pug.ann.example import train_weather_predictor
trainer, dataframe = train_weather_predictor(
        delays=(1, 2, 3),

All together now:

pip install pug-ann
epoch    995  total error       5.2621   avg weight         1.008
epoch    996  total error       5.2555   avg weight         1.008
epoch    997  total error       5.2483   avg weight         1.008
epoch    998  total error         5.24   avg weight         1.008
epoch    999  total error        5.231   avg weight         1.008

5 minutes later...

RMSE = 5.2 deg C 

Looks OK!

Not So Fast

Momentum "Trading"?

Predictor just extrpolates trend

Extroplate in space as well as time...

Add "nearby" Locations: 

  • Seattle?

  • Vancouver?

  • Hawaii?

  • Boise?

  • Sacramento?

Automatic Feature Selection

  • Mutual information
  • Entropy
  • Autocorrelation
  • Delayed cross-correlation


  • Prune

    • Near-zero weights

    • Low entropy

  • Meta learning

    • Reinforcement

    • Genetic

  • Convolution Structure

    • By name

    • By units

    • By stats