iqr returns the difference between the third and first quartiles. The optional second output contains the first and third quartiles.

Dimensions can be a scalar dimension, a vector of dimensions, or all.

A can be a real numeric array, a datetime array or a duration array. For datetime input data, the interquartile range r is a duration and the quartiles q are datetime values. For duration input data, r and q are durations. NaT values are omitted like NaN values.