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bug fix - preventing crashes when the probability of one of the actions is 0 in the policy head

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Itai Caspi
2017-10-31 10:49:50 +02:00
parent 1918f16079
commit 913ab75e8a
4 changed files with 5 additions and 3 deletions
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2
agents/actor_critic_agent.py
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@@ -121,7 +121,7 @@ class ActorCriticAgent(PolicyOptimizationAgent):
else:
action = np.argmax(action_probabilities)
action_info = {"action_probability": action_probabilities[action], "state_value": state_value}
self.entropy.add_sample(-np.sum(action_probabilities * np.log(action_probabilities)))
self.entropy.add_sample(-np.sum(action_probabilities * np.log(action_probabilities + eps)))
else:
# CONTINUOUS
state_value, action_values_mean, action_values_std = self.main_network.online_network.predict(observation)