Pizza St Martin

Monday, March 15th, 2010

He already railed against pies. So did I. With a lot of good reasons. Labels difficult. Area comparisons difficult. And so on. Actually, a pity. Because pie-charts state clearly: That’s all you can share. A Pie-chart claims: I am hundred percent. But you seldom know these.

Great, if a pie-chart does the job after all. Like here. Because it’s a pizza.

How to divide a pizza fair. - Source: Süddeutsche Zeitung, No. 21, 2010-01-27, Page 16.
Source: Süddeutsche Zeitung, No. 21, 2010–01–27, Page 16. Different ways to share a pizza – green is a fair share, red is unfair. Click to enlarge.

The pizza looks like a chart. But it’s not. The pizza has no topping. Salami, mushrooms, tomatoes, cheese: unimportant. Pizza as close to reality as possible. But no closer. And if you divide a pizza (if I was to slow), you really have to estimate areas.

Who has got pizza, paints pizza. Who has got numbers, shouldn’t paint.

Square pies taste bad

Tuesday, October 30th, 2007

Many concepts feel like “a solution desperately seeking an application“. Sometimes waiting is futile. Square pies are such an issue.

Wired offers a colorful mystery-pie. It argues that household budgets for tech gadgets haven’t changed much in the recent decade. But money is spent for other gadgets nowadays. Square pies don’t help to understand as Anil Dash and Juice Analytics have shown.

Square pie chart on spending for tech gadgets

I don’t like that Wired inherently focuses on a chronological development, but doesn’t show it.

“High tech gear gets cheaper every year. So we’re spending a lot less on it, right? Um, no. In fact, the proportion of US household budgets spent on tech products and services — computers, game consoles, cell phone service, cable, TVs — has held steady at about 5 percent for most of the past decade. We’re just spending that money — more than we pay for health insurance — on different stuff. For instance, we spend a lot less on TVs (as prices have dropped) but more on cable and satellite services (we need our HBO). Here’s a peek at how our quest to stay wired hits our wallets.”
Source: http://www.wired.com/techbiz/it/magazine/15–08/st_infoporn

The reader has to grasp that a square which is 23.6 % large has only been X large before. Because it has increased by 72 %. Ah. I didn’t get that. So I made up a table:

Square pie data I

I think know you see what the important items are, how the structure changed and what is new. The longer I looked at the data the more I wanted to know. Add share of total and accumulated views. Only for 2005.

Square pie data II

In the end it was clear: there is a whole lot in that data. You get it with a simple table.
The link in Wired is named “Infoporn”. Correctly.