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specify the meaning of logits in documentation #238

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specify the meaning of logits in documentation #238

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4 changes: 4 additions & 0 deletions docs/tutorials/dqn.rst
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Expand Up @@ -92,6 +92,10 @@ It is also possible to use pre-defined MLP networks in :mod:`~tianshou.utils.net
1. Input: observation ``obs`` (may be a ``numpy.ndarray``, ``torch.Tensor``, dict, or self-defined class), hidden state ``state`` (for RNN usage), and other information ``info`` provided by the environment.
2. Output: some ``logits``, the next hidden state ``state``. The logits could be a tuple instead of a ``torch.Tensor``, or some other useful variables or results during the policy forwarding procedure. It depends on how the policy class process the network output. For example, in PPO :cite:`PPO`, the return of the network might be ``(mu, sigma), state`` for Gaussian policy.

.. note::

The logits here indicates the raw output of the network. In supervised learning, the raw output of prediction/classification model is called logits, and here we extend this definition to any raw output of the neural network.


Setup Policy
------------
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