Scaling layer usage for action output
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Hello, I am using the tanhlayer as the output activation function for the action network while my action space is [0,10]. In this sense, I am referring to this answer by adding scaling layer.
However, I got saturated action value. I looked into the answer, shouldn't it be
scalingLayer('Scale',(actionInfo.UpperLimit-actionInfo.LowerLimit)/2,'Bias',(actionInfo.UpperLimit+actionInfo.LowerLimit)/2)
Thanks for your help.
Here is the code"
numActions = 2;
actInfo = rlNumericSpec([numActions 1],'LowerLimit',0,'UpperLimit', 10);
actorNetwork = [
featureInputLayer(numObservations,'Normalization','none','Name','State')
fullyConnectedLayer(32, 'Name','actorFC1')
reluLayer('Name','relu1')
fullyConnectedLayer(16, 'Name','actorFC2')
reluLayer('Name','relu2')
fullyConnectedLayer(numActions,'Name','Action')
tanhLayer('Name','tanh3')
scalingLayer('Scale',actInfo.UpperLimit-actInfo.LowerLimit,'Bias',(actInfo.UpperLimit-actInfo.LowerLimit)/2)
];
actordlNet = dlnetwork(actorNetwork);
actor = rlContinuousDeterministicActor(actordlNet,obsInfo,actInfo);
5 Comments
Emmanouil Tzorakoleftherakis
on 13 Jun 2023
Edited: Emmanouil Tzorakoleftherakis
on 13 Jun 2023
Can you post the code you are using to create the actor? Also, which agent are you using? At which value is the action saturated? Between [0 10] or something else?
Yihao Wan
on 13 Jun 2023
Yihao Wan
on 20 Jun 2023
Emmanouil Tzorakoleftherakis
on 20 Jun 2023
I corrected the answer, you are right, the scale factor should be divided by 2
Yihao Wan
on 20 Jun 2023
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