Heatmap

Cells or bins are colored based on data. As with all visualization types that use color as the main visual encoding, choose shades carefully.

Five years of traffic fatalities

I made a graphic a while back that showed traffic fatalities over a…

More on Making Heat Maps in R

You saw how to make basic heat maps a while back, but you might want more flexibility for a specific data set. Once you understand the components of a heat map, the rest is straightforward.

Calendar Heatmaps to Visualize Time Series Data

The familiar but underused layout is a good way to look at patterns over time.

Where are the biggest box office movies (not) streaming?

After seeing Tristan Louis' list that tallied the streaming availability of 2011's top 100 box office hits, I was curious what it looked like graphically.

Vehicles involved in fatal crashes

After seeing a map in The Guardian, I was curious about what other data was available from the National Highway Traffic Safety Association. It turns out there's a lot.

Last.fm scrobbles as calendar heat map

Martin Dittus, a former Last.fm employee, grabbed listening data for staff, moderators, and…

How to Make a Heatmap – a Quick and Easy Solution

A heatmap is a literal way of visualizing a table of numbers, where you substitute the numbers with colored cells. This is a quick way to make one in R.