extern crate argmin;
use argmin::prelude::*;
use argmin::solver::conjugategradient::ConjugateGradient;
struct MyProblem {}
impl ArgminOp for MyProblem {
type Param = Vec<f64>;
type Output = Vec<f64>;
type Hessian = ();
type Jacobian = ();
type Float = f64;
fn apply(&self, p: &Vec<f64>) -> Result<Vec<f64>, Error> {
Ok(vec![4.0 * p[0] + 1.0 * p[1], 1.0 * p[0] + 3.0 * p[1]])
}
}
fn run() -> Result<(), Error> {
let init_param: Vec<f64> = vec![2.0, 1.0];
let b = vec![1.0, 2.0];
let operator = MyProblem {};
let solver: ConjugateGradient<_, f64> = ConjugateGradient::new(b)?;
let res = Executor::new(operator, solver, init_param)
.add_observer(ArgminSlogLogger::term(), ObserverMode::Always)
.max_iters(2)
.run()?;
std::thread::sleep(std::time::Duration::from_secs(1));
println!("{}", res);
Ok(())
}
fn main() {
if let Err(ref e) = run() {
println!("{}", e);
}
}