Function simple_optimization::random_search

pub fn random_search<A: 'static + Send + Sync, T: 'static + Copy + Send + Sync + Default + SampleUniform + PartialOrd, const N: usize>(
    ranges: [Range<T>; N], 
    f: fn(_: &[T; N], _: Option<Arc<A>>) -> f64, 
    evaluation_data: Option<Arc<A>>, 
    polling: Option<u64>, 
    early_exit_minimum: Option<f64>, 
    iterations: u32
) -> [T; N]

Random search

Randomly pick parameters for simple_function in the ranges 0..5, 5..15, and 10..20 and return the parameters which produce the minimum result from simple_function out of 10,000 samples, printing progress every 10ms, and exiting early if a value is found which is less than or equal to 19..

use std::sync::Arc;
fn simple_function(list: &[f64; 3], _: Option<Arc::<()>>) -> f64 { list.iter().sum() }
let best = simple_optimization::random_search(
    [0f64..10f64, 5f64..15f64, 10f64..20f64], // Value ranges.
    simple_function, // Evaluation function.
    None, // No additional evaluation data.
    Some(10), // Print progress every `10ms`.
    Some(19.), // Exit early if `19..` or less is reached.
    1000, // Take `1000` samples (split between threads, so each thread only takes `1000/n` samples).
);
assert!(simple_function(&best, None) < 19.);