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How do I properly substitute rlRepresentation with rlValueRepresentation, rlQValueRepresentation, rlDetermin​isticActor​Representa​tion, and rlStochast​icActorRep​resentatio​n?

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Sammy Rossberg
Sammy Rossberg on 16 Jul 2020
Commented: Giampiero Campa on 4 Sep 2020 at 16:11
I am using MATLAB r2020a where rlRepresentation is "not recommended." As a result, I am forced to substitute it with the criritics or actors in the following compatibility guide (https://www.mathworks.com/help/reinforcement-learning/ref/rlrepresentation.html#mw_a6277225-fecf-4d97-9549-1fc4799bf5b6). I tried replacing rlRepresentation with rlValueRepresentation, rlQValueRepresentation, rlDeterministicActorRepresentation, and rlStochasticActorRepresentation (though I left rlRepresentationOptions as is where it came up). They all resulted in errors, and rlValueRepresentation and rlStochasticActorRepresentation had the fewest (and the same) errors:
Error using rlStochasticActorRepresentation (line 93)
Too many input arguments.
Error in createDDPGNetworks (line 51)
critic = rlStochasticActorRepresentation (criticNetwork,criticOptions, ...
Since both this critic and actor have the same error, I think it might have something to do with rlRepresentationOptions since it gives properties to the actors or critics (as far as I understand).
For reference, I am trying to emulate this project (https://www.youtube.com/watch?v=6DL5M9b2j6I) in MATLAB r2020a.
Any help is appreciated.

Answers (1)

Emmanouil Tzorakoleftherakis
It would be helpful if you pasted the exact MATLAB code you are typing to see what the problem is. I suspect you simply changed the method name, which is why you get the error you are seeing. Have a look at the documentation page for the respective method you want to use (rlValueRepresentation etc) and make sure the order and number of arguments matches the doc.

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