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I have a single-agent RL model in which the dimension of the dimension of the action space is $70$. This action space is too big and the deep RL agent is not learning properly. The boundaries of the action space are $-1$ and $1$.

My question is, how can I reduce the dimensionality of the action space? I have tried to use auto-encoders with random vectors of dimension $70$ between $-1$ and $1$, but it is not working properly. I am training the encoders using a hidden layer with 10 neurons. However, comparing the original action with the result of encoding and decoding it I can see that the average difference between the components is $0.2$ when the action is in the range $[-1,1]$

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    $\begingroup$ Can you provide more details about 1. how you're using and training auto-encoders and 2. what you mean by "it's not working"? $\endgroup$
    – nbro
    May 2, 2022 at 14:21

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