William Playfair
(1759-1823)
British mathematician
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William Playfair (22 September 1759 – 11 February 1823), a Scottish engineer and political economist, served as a secret agent on behalf of Great Britain during its war with France. The founder of graphical methods of statistics, Playfair invented several types of diagrams: in 1786 the line, area and bar chart of economic data, and in 1801 the pie chart and circle graph, used to show part-whole relations. As secret agent, Playfair reported on the French Revolution and organized a clandestine counterfeiting operation in 1793 to collapse the French currency.
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| Born |
22 September 1759 Benvie, Forfarshire, Scotland
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| Died |
11 February 1823 (aged 63) London, England
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| Zodiac | Virgo |
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