CALC.quartile(array, quart)

Returns the quartile of a data set. Argument array is the array of numeric values for which you want the quartile value. Argument quart (0 to 4) indicates which value to return.

Example

CALC.quartile([1,2,4,7,8,9,10,12], 1);

// returns 3.5 (first quartile (25 percentile))

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