Function digitize 

pub fn digitize<T>(
    x: &Array<T, Ix1>,
    bins: &Array<T, Ix1>,
    right: bool,
) -> Result<Array<u64, Ix1>, FerrayError>
where
    T: Element + PartialOrd + Copy,

Return the indices of the bins to which each value belongs.

If right is false (default), each index i satisfies bins[i-1] <= x < bins[i]. If right is true, each index i satisfies bins[i-1] < x <= bins[i].

Returns u64 indices.

Equivalent to numpy.digitize.