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Merged
nikhilbarhate99 merged 1 commit into from
Apr 10, 2019
Merged

edit advantage in surrogate #2

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edit advantage in surrogate
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@AlpoGIT
AlpoGIT authored Apr 9, 2019
commit 875762fd7cc74ce5c349a52362db5adfbb8818e9
2 changes: 1 addition & 1 deletion PPO_continuous.py
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Expand Up @@ -112,7 +112,7 @@ def update(self, memory):
# Finding Surrogate Loss:
advantages = rewards - state_values.detach()
surr1 = ratios * advantages
surr2 = torch.clamp(ratios, 1-self.eps_clip, 1+self.eps_clip)
surr2 = torch.clamp(ratios, 1-self.eps_clip, 1+self.eps_clip) * advantages
loss = -torch.min(surr1, surr2) + 0.5*self.MseLoss(state_values, rewards) - 0.01*dist_entropy

# take gradient step
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