Crate cuba

Rust binding for the Cuba integrator.

Cuba (http://www.feynarts.de/cuba/) is written by Thomas Hahn.

Usage

Create a CubaIntegrator and supply it with a function of the form

fn test_integrand(x: &[f64], f: &mut [f64], user_data: &mut T) -> i32 {
}

where T can be any type. If you don't want to provide user data, simply make T a usize and provide any number.

Example

extern crate cuba;
use cuba::{CubaIntegrator, CubaVerbosity};

#[derive(Debug)]
struct TestUserData {
    f1: f64,
    f2: f64,
}

#[inline(always)]
fn test_integrand(x: &[f64], f: &mut [f64], user_data: &mut TestUserData) -> i32 {
    f[0] = (x[0] * x[1]).sin() * user_data.f1;
    f[1] = (x[1] * x[1]).cos() * user_data.f2;
    0
}

fn main() {
    let mut ci = CubaIntegrator::new(test_integrand);
    ci.set_mineval(10).set_maxeval(10000);

    let r = ci.vegas(
        2,
        2,
        CubaVerbosity::Progress,
        TestUserData { f1: 5., f2: 7. },
    );
    println!("{:#?}", r);
}

Structs

CubaIntegrator	A Cuba integrator. It should be created with an integrand function.
CubaResult	The result of an integration with Cuba.

Enums

CubaVerbosity

Logging level.

Type Definitions

Integrand

Integrand evaluation function.