RSRL (api)

Reinforcement learning should be fast, safe and easy to use.

Overview

rsrl provides generic constructs for reinforcement learning (RL) experiments in an extensible framework with efficient implementations of existing methods for rapid prototyping.

Installation

[dependencies]
rsrl = "0.7"

Note that rsrl enables the blas feature of its ndarray dependency, so if you're building a binary, you additionally need to specify a BLAS backend compatible with ndarray. For example, you can add these dependencies:

blas-src = { version = "0.2.0", default-features = false, features = ["openblas"] }
openblas-src = { version = "0.6.0", default-features = false, features = ["cblas", "system"] }

See ndarray's README for more information.

Usage

The code below shows how one could use rsrl to evaluate a QLearning agent using a linear function approximator with Fourier basis projection to solve the canonical mountain car problem.

See examples/ for more...

extern crate rsrl;
#[macro_use]
extern crate slog;

use rsrl::{
    run, make_shared, Evaluation, SerialExperiment,
    control::td::QLearning,
    domains::{Domain, MountainCar},
    fa::linear::{basis::{Fourier, Projector}, optim::SGD, LFA},
    logging,
    policies::{EpsilonGreedy, Greedy, Random},
    spaces::Space,
};

fn main() {
    let domain = MountainCar::default();
    let mut agent = {
        let n_actions = domain.action_space().card().into();

        let basis = Fourier::from_space(5, domain.state_space()).with_constant();
        let q_func = make_shared(LFA::vector(basis, SGD(1.0), n_actions));

        let policy = EpsilonGreedy::new(
            Greedy::new(q_func.clone()),
            Random::new(n_actions),
            0.2
        );

        QLearning::new(q_func, policy, 0.01, 1.0)
    };

    let logger = logging::root(logging::stdout());
    let domain_builder = Box::new(MountainCar::default);

    // Training phase:
    let _training_result = {
        // Start a serial learning experiment up to 1000 steps per episode.
        let e = SerialExperiment::new(&mut agent, domain_builder.clone(), 1000);

        // Realise 1000 episodes of the experiment generator.
        run(e, 1000, Some(logger.clone()))
    };

    // Testing phase:
    let testing_result = Evaluation::new(&mut agent, domain_builder).next().unwrap();

    info!(logger, "solution"; testing_result);
}

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate and adhere to the angularjs commit message conventions (see here).

License

MIT

Moxinilian / rsrl