Pro Data Visualization using R and JavaScript

CHAPTER 5

Visualizing Spatial Data from Access Logs

In the last chapter, we talked about D3 and looked at concepts from making simple shapes to creating a bar chart out those shapes. In the previous two chapters, we took a deep dive into R. Now that you are familiar with the core technologies that we will be using, let’s begin looking at examples of how, as web developers, we can create data visualizations that communicate useful information around our domain.

The first one that we will look at is creating a data map out of our access logs.

What Are Data Maps?

First, let’s level set and make sure that we clearly define a data map. A data map ...