Function mae

pub fn mae<A, S, D>(
    pred: &ArrayBase<S, D>,
    target: &ArrayBase<S, D>,
) -> Option<A>
where
    A: FromPrimitive + Num + ScalarOperand + Signed,
    D: Dimension,
    S: Data<Elem = A>,

A functional implementation of the mean absolute error loss function which compares two similar arrays