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CHANGELOG.md

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2016-05-21

  • Updated Distribution class to include dimensions.

2016-04-24

  • Updated Mujoco to v1.31

2016-04-21

  • Fixed tensor_utils.concat_tensor_dict_list to handle nested situations properly.

2016-04-20

  • Default nonlinearity for CategoricalMLPPolicy changed to tanh as well, for consistency.
  • Add flatten_n, unflatten_n support for Discrete and Product spaces.
  • Changed dist_info_sym and dist_info interface for policies. Previously it takes both the observations and actions as input arguments, where actions are needed for recurrent policies when the policy takes both the current state and the previous action into account. However this is rather artificial. The interface is now changed to take in the observation plus a dictionary of state-related information. An extra property state_info_keys is added to specify the list of keys used for state-related information. By default this is an empty list.
  • Removed lasagne_recurrent.py since it's not used anywhere, and its functionality is replaced by GRUNetwork implemented in rllab.core.network.

2016-04-17

  • Restored the default value of the whole_paths parameter in BatchPolopt back to True. This is more consistent with previous configurations.

2016-04-16

  • Removed the helper method rllab.misc.ext.merge_dict. Turns out Python's dict constructor already supports this functionality: merge_dict(dict1, dict2) == dict(dict1, **dict2).
  • Added a min_std option to GaussianMLPPolicy. This avoids the gradients being unstable near deterministic policies.

2016-04-11

  • Added a method truncate_paths to the rllab.sampler.parallel_sampler module. This should be sufficient to replace the old configurable parameter whole_paths which has been removed during refactoring.

2016-04-10

  • Known issues:
    • TRPO does not work well with relu since the hessian is undefined at 0, causing NaN sometimes. This issue of Theano is tracked here: Theano/Theano#4353). If relu must be used, try using theano.tensor.maximum(x, 0.) as opposed to theano.tensor.nnet.relu.

2016-04-09

  • Fixed bug of TNPG (max_backtracks should be set to 1 instead of 0)
  • Neural network policies now use tanh nonlinearities by default
  • Refactored interface for rllab.sampler.parallel_sampler. Extracted new module rllab.sampler.stateful_pool containing general parallelization utilities.
  • Fixed numerous issues in tests causing too long to run.
  • Merged release branch onto master and removed the release branch, to avoid potential confusions.

2016-04-08

Features:

  • Upgraded Mujoco interface to accomodate v1.30