math-test-functions 0.5.2

A collection of non linear functions for testing optimisation algorithms
Documentation 
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//! Mishras Bird Objective test function

use ndarray::Array1;

/// Mishra's Bird objective function
pub fn mishras_bird_objective(x: &Array1<f64>) -> f64 {
    let x1 = x[0];
    let x2 = x[1];
    let sin_term = ((x1 * x2).exp().cos() - (x1.powi(2) + x2.powi(2)).cos()).sin();
    sin_term.powi(2) + 0.01 * (x1 + x2)
}