And speaking of height…

Another wonderful example, more powerful as words than as an image:

Jan Pen, a Dutch economist who died last year, came up with a striking way to picture inequality. Imagine people’s height being proportional to their income, so that someone with an average income is of average height. Now imagine that the entire adult population of America is walking past you in a single hour, in ascending order of income.

The first passers-by, the owners of loss-making businesses, are invisible: their heads are below ground. Then come the jobless and the working poor, who are midgets. After half an hour the strollers are still only waist-high, since America’s median income is only half the mean. It takes nearly 45 minutes before normal-sized people appear. But then, in the final minutes, giants thunder by. With six minutes to go they are 12 feet tall. When the 400 highest earners walk by, right at the end, each is more than two miles tall.

(From The Economist, by way of Eva)

Tuesday, February 1, 2011 | finance, scale  


I’ve been working on ways to visualize the current world economic situation along with the bailouts, the Recovery and Reinvestment Act, and so on, but South Park beat me to it.

Friday, March 27, 2009 | decisions, finance, government  

Songs off the Charts

I’m often asked about sonification—instead of visualization, turning data into audio—but I’ve never pursued it because there are other things that I’m more curious about. The bigger issue is that I was concerned that audio would require even more of a trained ear than a  visualization (according to some) requires a trained eye.

But now, Johannes Kreidler, with the help of Microsoft Songsmith, has proven me wrong:

Johannes, time to book your ticket to IEEE InfoVis.

My opinion of Songsmith is shifting — while it’s generally presented as a laughingstock, catastrophic failure, or if nothing else, a complete embarrassment (especially for its developers slash infomercial actors), it’s really caught the imagination of a lot of people who are creating new things, even if all of them subvert the original intent of the project. (Where the original intent was to… create a tool that would help write a jingle for glow in the dark towels?)

At any rate, I think it’s achieved another kind of success, and web memes aside, I’m curious to see what actual utility comes from derivatives of the project, now that the music idea is firmly planted in peoples’ heads.

And if you stopped the video halfway through because it got a little tedious, you missed some of the good bits toward the end.

(Thanks to Moiz Syed for the link.)

Sunday, February 1, 2009 | finance, music, sonification  

Visualizing Data Book CoverVisualizing Data is my book about computational information design. It covers the path from raw data to how we understand it, detailing how to begin with a set of numbers and produce images or software that lets you view and interact with information. Unlike nearly all books in this field, it is a hands-on guide intended for people who want to learn how to actually build a data visualization.

The text was published by O’Reilly in December 2007 and can be found at Amazon and elsewhere. Amazon also has an edition for the Kindle, for people who aren’t into the dead tree thing. (Proceeds from Amazon links found on this page are used to pay my web hosting bill.)

Examples for the book can be found here.

The book covers ideas found in my Ph.D. dissertation, which is basis for Chapter 1. The next chapter is an extremely brief introduction to Processing, which is used for the examples. Next is (chapter 3) is a simple mapping project to place data points on a map of the United States. Of course, the idea is not that lots of people want to visualize data for each of 50 states. Instead, it’s a jumping off point for learning how to lay out data spatially.

The chapters that follow cover six more projects, such as salary vs. performance (Chapter 5), zipdecode (Chapter 6), followed by more advanced topics dealing with trees, treemaps, hierarchies, and recursion (Chapter 7), plus graphs and networks (Chapter 8).

This site is used for follow-up code and writing about related topics.