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Expert Data Visualization

You're reading from   Expert Data Visualization Advanced information visualization with D3.js 4.x

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Product type Paperback
Published in Apr 2017
Publisher Packt
ISBN-13 9781786463494
Length 394 pages
Edition 1st Edition
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Author (1):
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Jos Dirksen Jos Dirksen
Author Profile Icon Jos Dirksen
Jos Dirksen
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Table of Contents (10) Chapters Close

Preface 1. Getting Started with D3 2. Basic Charts and Shapes FREE CHAPTER 3. Working with Hierarchical Data 4. Visualizing Graphs 5. Working with Geo Data 6. Visualizing Streaming Data 7. Voronoi Diagrams and Heatmaps 8. Custom Shapes and Paths and Using a Brush Selection 9. ES6, TypeScript, and External D3.js Libraries

Heatmap showing swearword usage in movies

For this last example, we're going to create a heatmap that shows how often swear words are used in movies. We're going to create a heatmap that looks like this:

In this figure, the colors show how often someone swears in that specific part of the movie. For this example, the movie is divided into 30 second segments. The numbers at the left side show how far in the movie we are, and the legend at the bottom shows the color coding used.

The first thing we need, though, is some data to visualize.

Preparing the data

The easiest way to determine the amount of swearing in a movie is by analyzing the subtitles. For most popular movies, you can download a subtitle file (in .srt format), which shows the time of a specific...

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