frequency of each data item
Important: The stats package has been deprecated. Use the superseding package Statistics instead.
The function frequency of the subpackage stats[transform, ...] replaces each data point of data by its frequency or weight.
The order of the data items is not changed.
Statistical data items in a list have a weight, obtained using transform[frequency] and a value, obtained using transform[statvalue]. One can obtained the total frequency, or total weight, using describe[count]. All frequencies in a statistical data list can be changed, proportionally, using the transform[scaleweight].
data ≔ Weight⁡3,10,missing,4,Weight⁡11..12,3,15..17
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