RL Algorithms

This table displays the rl algorithms that are implemented in the stable baselines project, along with some useful characteristics: support for recurrent policies, discrete/continuous actions, multiprocessing.

Name	Refactored [1]	Recurrent	Box	Discrete	Multi Processing
A2C	✔️	✔️	✔️	✔️	✔️
ACER	✔️	✔️	❌ [5]	✔️	✔️
ACKTR	✔️	✔️	❌ [5]	✔️	✔️
DDPG	✔️	✔️	✔️	❌	❌
DQN	✔️	❌	❌	✔️	❌
GAIL [2]	✔️	✔️	✔️	✔️	✔️ [4]
PPO1	✔️	✔️	✔️	✔️	✔️ [4]
PPO2	✔️	✔️	✔️	✔️	✔️
TRPO	✔️	✔️	✔️	✔️	✔️ [4]

[1]	Whether or not the algorithm has be refactored to fit the BaseRLModel class.

[2]	Only implemented for TRPO.

[3]	Only implemented for DDPG.

[4]	(1, 2, 3) Multi Processing with MPI.

[5]	(1, 2) TODO, in project scope.

Actions gym.spaces:

• Box: A N-dimensional box that containes every point in the action space.
• Discrete: A list of possible actions, where each timestep only one of the actions can be used.
• MultiDiscrete: A list of possible actions, where each timestep only one action of each discrete set can be used.
• MultiBinary: A list of possible actions, where each timestep any of the actions can be used in any combination.