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Frédéric

To give back to Caesar the things that are Caesar's... the original idea for the plot comes from Stephen Few's document Save the pies for desert (page 11) -- although I chose to use vertical barcharts instead of horizontal ones, since it makes comparing them easier.

Frédéric

derek

This is, of course, the same S. S. Stevens who gave us the language of nominal, ordinal, interval, and ratio to distinguish between the different types of data we may graph and to suggest how we ought to treat them.

Chris P

The graphs are copies from William Cleveland's book the Elements of Graphical. I had made a version earlier and wikieditor Schultz had done a nice clean up of them. See the discussion page for Pie Charts for more details.

Cleveland's references regarding the readability of various charts probably go back to primary work from the 1970s and early 1980's. Given the explosion of spreadsheet graphics which may or may not have created a smarter user base, it may be that pie charts are not nearly as bad as they once were.

Frédéric

Hi Chris -- indeed, I just had a look at Cleveland's book and noticed the graph, which I did not remember at all (in my edition it's on pages 262-263). Few's document, however, is the first place where I saw such a plot with several pie charts and barplots, showing how hard it is to compare the data across pie charts.

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