rsneat

rsneat 是一个开源的crate，实现了NEAT遗传算法。这个实现基于原始的2002年论文。

这个项目的目的是帮助我学习Rust和Rust生态系统。在没有极端谨慎的情况下，可能不应该将此项目用于任何严肃的项目。

示例

此示例使用neat模拟来找到一个计算异或函数的算法

let mut neat = Neat::new();
let mut founder = Genome::new(3, 1);
founder.add_connection(0, 3, 0.0, &mut neat);
founder.add_connection(1, 3, 0.0, &mut neat);
founder.add_connection(2, 3, 0.0, &mut neat);

let mut pop = Population::clone_from(founder, &neat);
loop {
    let mut correct = true;
    for (mut n, fitness) in pop.iter_fitness() {
        correct = true;
        let data = [
            (vec![0.0, 0.0, 1.0], 0.0, false),
            (vec![0.0, 1.0, 1.0], 1.0, true),
            (vec![1.0, 0.0, 1.0], 1.0, true),
            (vec![1.0, 1.0, 1.0], 0.0, false),
        ];

        let mut error = 0.0;
        *fitness = 0.0;
        for (input, output, c) in data.iter() {
            for _ in 0..5 {
                let _ = n.activate(input.clone().into_iter());
            }
            let result = n.activate(input.clone().into_iter()).next().unwrap();
            let result_error = (result - output).abs();
            error += result_error;

            let result = result >= 0.5;
            if *c != result {
                correct = false;
            }

            n.reset();
        }
        *fitness += 4.0 - error;
        *fitness *= *fitness;
        if correct {
            break;
        }
    }
    if correct {
        pop.champ().write(&mut std::fs::File::create("champ.neat").unwrap()).unwrap();
        println!("Got a champ after {} gens!", pop.gen());
    }
    pop.evaluate_generation(&mut neat);
}