externcrate peroxide;useperoxide::*;#[test]fntest_jacobian(){let x =c!(1,0);let j =jacobian(f, x);assert_eq!(j,ml_matrix("0 1; 5 1"));}/// Test function
////// # Function
/// $$\begin{pmatrix} x^2 y \\\ 5x+ \sin y \end{pmatrix}$$
////// # Jacobian
/// $$\begin{pmatrix} 2xy & x^2 \\\ 5 & \cos y \end{pmatrix}$$
fnf(xs:Vec<Number>)->Vec<Number>{let x = xs[0];let y = xs[1];vec![
x.powi(2)* y,5f64* x + y.sin(),]}