Finding the Outliers

The Dartmouth Atlas of Health Care has done a great job of providing visualizations of some complex healthcare datasets released by the Centers for Medicare & Medicaid Services. While checking it out, I noticed the following graph:

Each blue dot represents a metropolitan area, and it has a value that makes it line up with the vertical axis. If you click through to the actual site, you’ll note the city and the value appear when you hover over a blue dot. This unique method of presenting information makes it trivial to see who the outliers are, and also clearly exposes the distribution of values amongst the field. Note also the high data-ink ratio; there is very little on the page that doesn’t convey useful information.

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Smart Phone Marketshare

The Nielson Company just published some interesting graphs showing US smartphone manufacturer operating system share.

The colors are a bit loud for my tastes, but this is an excellent graphic. It cleverly combines market share by both hardware manufacturer and operating system into a single, easy to understand graphic. There is no chartjunk. You can look at the graphic without reading the article and instantly understand what they are trying to convey.

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Weak Tea Indeed

Boston Review published an article entitled Weak Tea by two Harvard professors, Stephen Ansolabehere and James M. Snyder, Jr, in which they assess the impact of the Tea Party movement on the 2010 elections. Regardless of whether you agree with their assessment, the graph they include in their report is horrible.

This is a great example of a duck, Edward Tufte’s moniker for a graphic whose overall design purveys graphical style rather than quantitative information. The aged paper border, the flagged elephant in the background, and the horrible choice of elephants and the letter “T” for the data points lower the data-ink ratio considerably. Most of the ink in this graphic could be removed with no loss of data-information. Weak tea indeed.

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William Playfair Would Be Disappointed

In the beginning we had geographic maps and tables of numbers. And that suited us just fine for hundreds of years. Fast forward to today, and we’ve got gaudy preso’s with ugly 3D stacked bar charts. Where did we go wrong?

In 1759 a kid was born in Scotland who would change the way we consume information. By the age of 18, William Playfair was a draftsman for James Watt, the guy who didn’t invent the lightbulb but somehow got his name on every bulb sold (sorry Edison). Playfair tried silversmithing, stormed the Bastille during the French Revolution, and started a bank. In between he wrote pamphlets and developed a taste for economics.

In 1786 he published The Commercial and Political Atlas which was the first major work to contain statistical graphs; 43 time series plots and the one bar chart, the first one ever published. Fifteen years later his Statistical Breviary introduced the first pie chart. Playfair wrote:

Information, that is imperfectly acquired, is generally as imperfectly retained; and a man who has carefully investigated a printed table, finds, when done, that he has only a very faint and partial idea of what he had read; and that like a figure imprinted on sand, is soon totally erased and defaced. The amount of mercantile transactions in money, and of profit or loss, are capable of being as easily represented in drawing, as any part of space, or as the face of a country; though, till now, it has not been attempted. Upon that principle these Charts were made; and, while they give a simple and distinct idea, they are as near perfect accuracy as is any way useful. On inspecting any one of these Charts attentively, a sufficiently distinct impression will be made, to remain unimpaired for a considerable time, and the idea which does remain will be simple and complete, at once including the duration and the amount.

Statistical Breviary, p. 3-4

And from that eloquent beginning we now have the Excel Chart Wizard. William Playfair would be disappointed.

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Adobe AIR on amd64 or ia64 Ubuntu/Kubuntu

Adobe does not yet have a 64 bit version of the AIR SDK or runtime for Linux. They do have some instructions for getting it to work. If you run Ubuntu, it is much simpler. just type:

$ sudo aptitude install ia32-libs lib32asound2 lib32gcc1 lib32ncurses5 lib32stdc++6 lib32z1 libc6 libc6-i386

I have only tested this on Jaunty, so I can’t promise it works on earlier releases, but it’s lots easier than the manual unpacking stuff on Adobe’s page.

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