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A fan chart is made of a group of dispersion fan diagrams, which may be positioned according to two categorising dimensions. A ''dispersion fan diagram'' is a circular diagram which reports the same informations about a dispersion as a box plot: namely median, quartiles, and two extreme values. == Elements == The elements of a dispersion fan diagram are: # a ''circular line'' as scale # a ''diameter'' which indicates the median # a ''fan'' (a segment of a circle) which indicates the quartiles # two ''feathers'' which indicate the extreme values. The scale on the circular line begins at the left with the starting value (e. g. with zero). The following values are applicated clockwise. The white tail of diameter indicates the median. The dark fan indicates the dispersion of the middle half of the observed values; thus it encompasses the values from the first to the third quartile. The white feathers indicate the dispersion of the middle 90% of the observed values. The length of the white part of the diameter corresponds with the number of observations. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fan chart (statistics)」の詳細全文を読む スポンサード リンク
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