Pneuma/pneuma-pygame
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Converted advantage to float as gae to pass to main.py

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This commit is contained in:
Vasilis Valatsos 2024-03-07 10:52:15 +02:00
parent 30dda47f95
commit 1ab8df01ea
2 changed files with 8 additions and 7 deletions
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2
main.py
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@ -133,7 +133,7 @@ def main():
= player.agent.entropy
episode_advantage[player.player_id][learn_iters % learnings_per_episode]\
= player.agent.advantage
= player.agent.gae
learn_iters += 1

13
ml/ppo/agent.py
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@ -61,7 +61,7 @@ class Agent:
state_arr, action_arr, old_probs_arr, vals_arr, reward_arr, dones_arr, batches = self.memory.generate_batches()
values = vals_arr
self.advantage = np.zeros(len(reward_arr), dtype=np.float64)
advantage = np.zeros(len(reward_arr), dtype=np.float64)
for t in range(len(reward_arr)-1):
discount = 1
@ -71,8 +71,9 @@ class Agent:
(reward_arr[k] + self.gamma*values[k+1]
* (1-int(dones_arr[k])) - values[k])
discount *= self.gamma * self.gae_lambda
self.advantage[t] = a_t
self.advantage = T.tensor(self.advantage).to(self.actor.device)
advantage[t] = a_t
self.gae = np.sum(advantage)
advantage = T.tensor(advantage).to(self.actor.device)
values = T.tensor(values).to(self.actor.device)
@ -90,15 +91,15 @@ class Agent:
new_probs = dist.log_prob(actions)
prob_ratio = new_probs.exp() / old_probs.exp()
weighted_probs = self.advantage[batch] * prob_ratio
weighted_probs = advantage[batch] * prob_ratio
weighted_clipped_probs = T.clamp(
prob_ratio, 1-self.policy_clip, 1+self.policy_clip)*self.advantage[batch]
prob_ratio, 1-self.policy_clip, 1+self.policy_clip)*advantage[batch]
self.actor_loss = -T.min(weighted_probs,
weighted_clipped_probs).mean()
returns = self.advantage[batch] + values[batch]
returns = advantage[batch] + values[batch]
self.critic_loss = (returns - critic_value)**2
self.critic_loss = self.critic_loss.mean()