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("William Playfair") returned 2 hits
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1
1786 Bar chart, line graph invented
Author:
William
Playfair
(1759-1823)
Bar chart, line graphs of economic data
Category: Statistics & Graphics
2
1801 Pie chart
Author:
William
Playfair
(1759-1823)
Invention of the pie chart, and circle graph, used to show part-whole relations
Category: Statistics & Graphics