finitediff::array::hessian

Function forward_hessian_nograd_sparse_const

Source 
pub fn forward_hessian_nograd_sparse_const<const N: usize, F>(
    x: &[F; N],
    f: &'_ dyn Fn(&[F; N]) -> Result<F, Error>,
    indices: Vec<[usize; 2]>,
) -> Result<[[F; N]; N], Error>
where
    F: Float + FromPrimitive + AddAssign,