Archive for March, 2008

“You can’t have the pie and eat it, too”

Sunday, March 30th, 2008

Appetite always signals which piece of the pie is biggest. Always? Sort the pieces. How long did it take?

Pie

Sort the bars. How long did it take? Values are the same in both cases.

Bars

Eric has the same example. But while scaling the bars he was tricked by Excel.

Guess what the circular area represents. And?

Circular area as measure

Its even worse in Excel. You can use the diameter to show the value.

Diameter as measure

It’s enough to drive a person mad.

Pimpcharts in his beloved SportAuto newspaper

Saturday, March 15th, 2008

His day was ruined already. His beloved SportAuto newspaper had graphically demolished 500 yards of safety fence. I wanted to comfort him and skimmed through the paper. Issue seven 2006. Insiders know. Ooh…

SportAuto Manual correction of the chart

Page 102 in the same issue: Formula One lap times from two seasons. Smaller engines yet faster again. Very interesting comparison. Good data. Good legend. Beautiful Evidence.

But the chart: a total loss. Reason: Gross negligence. On the right side: That’s how it should have looked like. The two Grand Prix which are not comparable (rain in Australia, new race track in Imola) are left out. During the race they have been faster twice and slower three times. Just the opposite for the training.

Correct display

In the last two issues of SportAuto: not one chart at all. Good.