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So, for those that don't get it, this appears to be one of those self-referential charts.

The percentage of blue pixels in the chart is shown by the red section of the chart, and vice-versa (notice the labeling).

See also: http://xkcd.com/688/

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yes I got it, I could still see which part was bigger.

but not very accurately. perspective is a bitch.

That is an isometric projection.

What I still don't get is when it became impossible to change the color of a slice of a pie chart.

This isn't a post about why pie charts are bad, it's a post about why lazy charters who waste our time are bad.

Look again. The point isn't that he's using blue for red and vice versa, the point is that the 3d chart distorts the information. In a 2d chart, we'd have equal shares for each color. Since it's 3d, even though blue has a smaller slice, it gets more pixels.

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