Book Image

HTML5 Graphing and Data Visualization Cookbook

By : Ben Fhala
Book Image

HTML5 Graphing and Data Visualization Cookbook

By: Ben Fhala

Overview of this book

The HTML5 canvas tag makes creating any plot shape easy, all you have to do then is fill it with exciting visualizations written in JavaScript or using other visualization tools. "HTML5 Graphing and Data Visualization Cookbook" is the perfect break into the world of Canvas, charts, and graphs in HTML5 and JavaScript. In this book we will go through a journey of getting to know the technology by creating and planning data-driven visualizations. This cookbook is organized in a linear, progressive way so it can be read from start to finish, as well as be used as a resource for specific tasks.This book travels through the steps involved in creating a fully interactive and animated visualization in HTML5 and JavaScript. You will start from very simple "hello world"ù samples and quickly dive deeper into the world of graphs and charts in HTML5. Followed by learning how canvas works and carrying out a group of tasks geared at taking what we learned and implementing it in a variety of chart types. With each chapter the content becomes more complex and our creations become more engaging and interactive.Our goal is that by the end of this book you will have a strong foundation; knowing when to create a chart on your own from scratch and when it would be a good idea to depend on other APIs.We finish our book in our last two chapters exploring Google maps and integrating everything we learnt into a full project.
Table of Contents (17 chapters)
HTML5 Graphing and Data Visualization Cookbook
About the Author
About the Reviewer

Creating charts using the ChartWrapper

There are two ways to create charts with Google Charts. One is the way we did it in the recipe Getting started with a pie chart and the second will be covered in this recipe. The goal of the ChartWrapper object is to enable you to cut down the amount of code needed to create a chart.

Its main advantages are less code and more flexibility of data sources. Its disadvantage is less control over the steps of graph creation.

Getting ready

Grab the HTML file from the last recipe (Getting started with pie charts). We will only modify the file path of the external JavaScript file and the rest of the code will remain the same.

How to do it...

After changing the path of the HTML file source to the JavaScript file, it's time to go into the JavaScript file and start over:

  1. Load Google API (you do not need to mention what you want to load any more) and add a callback:

    google.load('visualization', '1.0');
  2. Create the init function:

    function init...