Benjamin Chodoroff bnchdrff

Like a box plot, a quartile plot summarises a distribution with five statistics: the median (the dot); the upper quartile and the maximum value (either end of the upper centre line); and the lower quartile and the minimum value (either end of the lower centre line). However, a quartile plot reduces a box plot's glyphs to one dot and two lines, so it has a larger data-ink ratio.

For more information about quartile plots, see:

Tufte, E.R., 2001. The Visual Display of Quantitative Information. 2nd ed. Cheshire, CT, USA: Graphics Press.

Data

Refractive indices of samples of six types of glass, gathered for criminological investigation (source).

	BASE='http://docs.google.com/a/localdata.com/spreadsheet/ccc?output=csv&key=0Aty9maMoYSDFdDFNQk93TjUzc0haeGVjWGtORVAzYlE&gid=';

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	do
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	/usr/bin/wget -O test$SHEET.csv "$PATH"
	done

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