Recent See All →

Air transportation network

Flight pattern maps are fun to look at and reveal the complexity of air transportation on a daily basis. But, …

Automatic versus manual data analysis

Hilary and Roger touch on some interesting topics in the most recent Not So Standard Deviations, specifically on scalable and …

Bias built in to crime prediction

Predictive policing seems to be playing a bigger role in court decisions these days. People charged with crimes can be …

National drug overdose epidemic

Nadja Popovich for the Guardian delves into America’s drug overdose epidemic, starting with an animated map that shows changes from …

Bot automatically generates maps from American Community Survey data

The American Community Survey is an ongoing survey run by the United States Census Bureau that collects data about who …

OpenVis Conf talks all online

If you’re looking for a knowledge bomb during your lunch breaks, the OpenVis Conf talks from this year are all …

Network visualization shows transitions between states

If you think of network visualization as a collection of nodes and edges, you typically get a bunch of circles …

Gender pay gaps for major U.S. occupations

As we all know these days, there exists a gender pay gap across most major professions in the United States. …

Life transition seen through music listening

Quantified Selfie is a project to find narratives in an individual’s personal dataset. It’s not about optimization or self-improvement. It’s …

Kung fu particles

Using motion capture methods, Tobias Gremmler collected movement data for two kung fu masters. Then he visualized the results with …

Features See All →

The Changing American Diet

See what we ate on an average day, for the past several decades.

Who is Older and Younger than You

Here’s a chart to show you how long you have until you start to feel your age.

Working Parents

Here are the mothers and fathers who work like you.

Shifting Parent Work Hours, Mom vs. Dad

Articles about stay-at-home dads and parents with even work loads might make it seem like dads are putting in a lot of hours in the household these days. Are they? How do they compare to moms’ work hours?

Divorce Rates for Different Groups

We know when people usually get married. We know who never marries. Finally, it’s time to look at the other side: divorce and remarriage.

Comparing ggplot2 and R Base Graphics

Figure out which is best with a side-by-side comparison.

Tutorials See All →

Drawing Lines and Segments in R

Show connections and changes over time with start and end points.

Drawing Circles and Ellipses in R

Whether you use circles as visual encodings or as a way to highlight areas of a plot, there are functions at your disposal.

Drawing Squares and Rectangles in R

R makes it easy to add squares and rectangles to your plots, but it gets a little tricky when you have a bunch to draw at once. The key is to break it down to the elements.

Voronoi Diagram and Delaunay Triangulation in R

The deldir package by Rolf Turner makes the calculations and plotting straightforward, with a few lines of code.

Guides See All →

What I Use to Visualize Data

“What tool should I learn? ” I hesitate to answer, because I use what works best for me, which isn’t necessarily the best for someone else or the “best” overall. Nevertheless, here’s my toolset.

Venn Diagrams: Read and Use Them the Right Way

Venn diagrams seem straightforward, but why all the mistakes? Here’s a guide to avoid the snafus.

Bar Chart Baselines Start at Zero

There are visualization rules and there are visualization suggestions. Most are suggestions. The ones that are rules exist because of how our brains process visual information. There’s just no getting around it.

Real Chart Rules to Follow

There are rules—usually for specific chart types meant to be read in a specific way—that you shouldn’t break. When they are, everyone loses. This is that small handful.