Pie chart
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A pie chart is a circular statistical graphic which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice is proportional to the quantity it represent
Pie charts from William Playfair's "Statistical Breviary", 1801
One of the earliest pie charts, 1801
Polar chart by Florence Nightingale, 1858
Wind rose
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A wind rose is a diagram used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location. Historically, wind roses were predecessors o
Pie chart
…and deaths by hour of the day. Léon Lalanne later used a polar diagram to show the frequency of wind directions around compass points in 1843. The wind rose is still used by meteorologists. Nightingale published her rose diagram in 1858. Although the name "coxcomb" has come to be associated with this type…
Wind rose plot for LaGuardia Airport (LGA), New York, New York, 2008
Four charts of the wind, 18th-century illustration based on medieval wind roses