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William Playfair (22 September 1759 – 11 February 1823) was a Scottish engineer and political economist.The founder of graphical methods of statistics, [1] Playfair invented several types of diagrams: in 1786 he introduced the line, area and bar chart of economic data, and in 1801 he published what were likely the first pie chart and circle graph, used to show part-whole relations. [2]
The earliest known pie chart is generally credited to William Playfair's Statistical Breviary of 1801, in which two such graphs are used. [1] [2] [9] Playfair presented an illustration, which contained a series of pie charts.
The first known bar charts are usually attributed to Nicole Oresme, Joseph Priestley, and William Playfair. [4] A pie chart shows percentage values as a slice of a pie; first introduced by William Playfair. [5] A line chart is a two-dimensional scatterplot of ordered observations where the observations are connected following their order. The ...
William Playfair's trade-balance time-series chart, published in his Commercial and Political Atlas, 1786 John Snow's Cholera map in dot style, 1854. Famous graphics were designed by: William Playfair who produced what could be called the first line, bar, pie, and area charts.
Pages in category "Statistical charts and diagrams" The following 122 pages are in this category, out of 122 total. ... Pie chart; William Playfair; Poincaré plot;
William Playfair is usually credited with inventing the area charts as well as the line, bar, and pie charts.His book The Commercial and Political Atlas, published in 1786, contained a number of time-series graphs, including Interest of the National Debt from the Revolution and Chart of all the Imports and Exports to and from England from the Year 1700 to 1782 that are often described as the ...
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A pie chart or bar chart can show the comparison of ratios, such as the market share represented by competitors in a market. Deviation: Categorical subdivisions are compared against a reference, such as a comparison of actual vs. budget expenses for several departments of a business for a given time period.