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wd

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Reply with quote  #1 
In "Save the Pies for Dessert" (Copyright © 2007 Stephen Few, Perceptual Edge) , Steve freely admits that  "Pie charts are not without their strengths. The primary strength of a pie chart is the fact that the message “part-to-whole relationship” is built right into it in an obvious way" - a statement with which we can all agree.  He goes further to state that   "A bar graph doesn’t have this obvious purpose built into its design. Not as directly, anyway, but it can be built into bar graphs in a way that prompts people to think in terms of a whole and its parts. This can be accomplished in part by using a percentage scale" - and again we agree.
 
We passionately state that "The only time a pie chart is appropriate is at a baker's convention" (http://www.plainfigures.com) all the while allowing that bar charts only 'accomplish in part' the part to whole concept.
 
And then I started to read Now You See It.  At the bottom of p56, Steve shows us a great way to enhance the part to whole perception for a bar graph by showing the part to whole arithmetic as part of the axis labelling. 
 
Thank you Steve!
 
 
 
 
 
 

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Bill Droogendyk
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