Pie-chart
A Circular Chart (usually called a diagram in Camembert cheese , English: magpie-chart , diagram " tart ") is a type of diagram used in Statistiques. It makes it possible to represent a small number of values by Angle S proportional to these values.
Examples (with " effect; 3D") :
Two diagrams appear since 1801 in the work Statistical Breviary of William Playfair, but there will be very few uses at that time. In 1858, Charles Joseph Minard uses some on charts.
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