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

CuhreIntegrand	Cuhre integrand evaluation function.
DivonneIntegrand	Divonne integrand evaluation function.
SuaveIntegrand	Suave integrand evaluation function.
VegasIntegrand	Vegas integrand evaluation function.