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Modify hidden activation #317

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Aug 19, 2021
Merged

Modify hidden activation #317

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1 change: 1 addition & 0 deletions configs/lunarlander_continuous_v2/ppo.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ learner_cfg:
type: "GaussianDist"
configs:
hidden_sizes: [256, 256]
hidden_activation: "tanh"
output_activation: "identity"
fixed_logstd: True
critic:
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5 changes: 5 additions & 0 deletions rl_algorithms/common/helper_functions.py
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Expand Up @@ -28,6 +28,11 @@ def identity(x: torch.Tensor) -> torch.Tensor:
return x


def relu(x: torch.Tensor) -> torch.Tensor:
"""Return torch.relu(x)"""
return torch.relu(x)


def soft_update(local: nn.Module, target: nn.Module, tau: float):
"""Soft-update: target = tau*local + (1-tau)*target."""
for t_param, l_param in zip(target.parameters(), local.parameters()):
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6 changes: 5 additions & 1 deletion rl_algorithms/common/networks/heads.py
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Expand Up @@ -61,7 +61,11 @@ def __init__(
self.hidden_sizes = configs.hidden_sizes
self.input_size = configs.input_size
self.output_size = configs.output_size
self.hidden_activation = hidden_activation
self.hidden_activation = (
getattr(helper_functions, configs.hidden_activation)
if "hidden_activation" in configs.keys()
else hidden_activation
)
self.output_activation = getattr(helper_functions, configs.output_activation)
self.linear_layer = linear_layer
self.use_output_layer = use_output_layer
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