File size: 1,082 Bytes
a89d35f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | .. _distributions:
Probability Distributions
=========================
Probability distributions used for the different action spaces:
- ``CategoricalDistribution`` -> Discrete
- ``DiagGaussianDistribution`` -> Box (continuous actions)
- ``StateDependentNoiseDistribution`` -> Box (continuous actions) when ``use_sde=True``
.. - ``MultiCategoricalDistribution`` -> MultiDiscrete
.. - ``BernoulliDistribution`` -> MultiBinary
The policy networks output parameters for the distributions (named ``flat`` in the methods).
Actions are then sampled from those distributions.
For instance, in the case of discrete actions. The policy network outputs probability
of taking each action. The ``CategoricalDistribution`` allows to sample from it,
computes the entropy, the log probability (``log_prob``) and backpropagate the gradient.
In the case of continuous actions, a Gaussian distribution is used. The policy network outputs
mean and (log) std of the distribution (assumed to be a ``DiagGaussianDistribution``).
.. automodule:: stable_baselines3.common.distributions
:members:
|