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Merge pull request #5 from wassname/patch-2

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add eps to log_density to avoid NaN
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Shangtong Zhang authored and GitHub committed 2017-11-04 09:13:29 -06:00
2 parents 9ef309696f deab7043fc
commit cc1e1415c7
1 file changed
+1 -1
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network/continuous_action_network.py
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@@ -154,7 +154,7 @@ class GaussianActorNet(nn.Module, BasicNet):
def log_density(self, x, mean, log_std, std):
var = std.pow(2)
log_density = -(x - mean).pow(2) / (2 * var) - 0.5 * torch.log(2 * Variable(torch.FloatTensor([np.pi])).expand_as(x)) - log_std
log_density = -(x - mean).pow(2) / (2 * var + 1e-5) - 0.5 * torch.log(2 * Variable(torch.FloatTensor([np.pi])).expand_as(x)) - log_std
return log_density.sum(1)
def entropy(self, std):