Effective Plotting

Scatter and Line Plots

Brett Andrews

10.30.2018

Don't make me think!

Take advantage of human perception.

Color better than shape.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Which colors play nicely together?

Demiralp et al. (2014), "Learning Perceptual Kernels for Vizualization Design."

Which shapes play nicely together?

Demiralp et al. (2014), "Learning Perceptual Kernels for Vizualization Design."

Distinguishability falls off a cliff unless data is highly structured.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Proximity: Things that are spatially near to one another seem to be related.
Similarity: Things that look alike seem to be related.
Connection: Things that are visually tied to one another seem to be related.
Continuity: Partially hidden objects are completed into familiar shapes.
Closure: Incomplete shapes are perceived as complete.
Figure and Ground: Visual elements are taken to be either in the foreground or the background.
Common Fate: Elements sharing a direction of movement are perceived as a unit.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Don't need to show all data in one panel.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Multiple panels add structure.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Annotate outliers.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Alpha for overlapping points.

Kieran Healy, "Data Vizualization: a Practical Introduction."

Basic Legend.

Matt Hall

More intuitive.

Matt Hall

Black and white option.

Don't use jet.

Sequential Colormaps

Diverging Colormaps

Qualitative Colormaps

Matplotlib docs

Cyclic Colormaps

New in Matplotlib 3!

Colormaps in the wild.

Marvin

Don't make me think!

Take advantage of human perception.

Data-Ink Ratio

Remove chartjunk.

Vertical Slides

Slides can be nested inside of each other.

Use the Space key to navigate through all slides.

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.

Slides

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

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.

Fragments

Hit the next arrow...

... to step through ...

... a fragmented slide.

Fragment Styles

There's different types of fragments, like:

grow

shrink

fade-out

fade-right, up, down, left

fade-in-then-out

fade-in-then-semi-out

Highlight red blue green

Transition Styles

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

Themes

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

Slide Backgrounds

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

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">

... and GIFs!

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

One is smaller than...
Two is smaller than...
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

THE END

- Try the online editor
- Source code & documentation