Function range 

pub fn range<T>(data: &[T]) -> Option<T>
where
    T: PartialOrd + Copy + Sub<Output = T>,

Computes the range a data series.

NOTE: Returns None if the input slice is empty.

Examples

use quant_mathema::stats::range;

let data = [4.0, 2.0, 9.0, 1.0, 7.0];
let result = range(&data);
assert_eq!(result, Some(8.0));