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Open source code to reproduce Making deep Q-learning approaches robust to time discretization

This repository provides code to reproduce the results of Making deep Q-learning approaches robust to time discretization Arxiv, Blog post. In addition, we also provide implementations for some standard reinforcement learning algorithms.

Typical run commands are run from the code subdirectory and take the form

python run.py --logdir existing_dir_where_you_want_to_store_your_logs [options]

The most critical options are

  • --algo: which algo to use. Currently, the algorithms available are ddpg, dqn, ddau (for discrete deep advantage updating), cdau (for continuous deep advantage updating), a2c and ppo.
  • --dt: inverse of the framerate, or discretization timestep. Expect learning times to scale as 1/dt.
  • --noise_type: wether you want to use temporally coherent noise or independent noise.
  • --gamma: the discount factor IN PHYSICAL TIME. The actual discount factor will be gamma^dt.
  • --env_id: environment to train upon.

Other parameters are algorithm dependent, run python main.py --help to get more details, check the code for precise details.

Run examples

Bipedal walker with DDPG:

python main.py --algo ddpg --steps_btw_train 10 --noise_type coherent --batch_size 256 --hidden_size 256 --nb_layers 1 --gamma 0.8 --nb_steps 100 --sigma 1.5 --theta 7.5 --nb_train_env 256 --nb_eval_env 64 --memory_size 1000000 --learn_per_step 50 --eval_gap 0.05   --weight_decay 0.0   --tau 0.9 --optimizer rmsprop --env_id bipedal_walker --time_limit 10 --dt 0.02 --normalize_state  --lr 0.1 --policy_lr 0.02  --noscale --nb_true_epochs 20 --logdir ~/logdir

Bipedal walker with DAU:

python main.py --algo cdau --steps_btw_train 10 --noise_type coherent --batch_size 256 --hidden_size 256 --nb_layers 1 --gamma 0.8 --nb_steps 100 --sigma 1.5 --theta 7.5 --nb_train_env 256 --nb_eval_env 64 --memory_size 1000000 --learn_per_step 50 --eval_gap 0.05   --weight_decay 0.0   --tau 0.0 --optimizer rmsprop --env_id bipedal_walker --time_limit 10 --dt 0.02 --normalize_state  --lr 0.1 --policy_lr 0.02   --nb_true_epochs 20 --logdir ~/logdir

Bipedal walker with A2C:

python main.py --algo a2c --steps_btw_train 20 --noise_type coherent --batch_size 256 --hidden_size 256 --nb_layers 1 --gamma 0.8 --nb_steps 100 --sigma 1.5 --theta 7.5 --nb_train_env 256 --nb_eval_env 64 --memory_size 1000000 --learn_per_step 50 --eval_gap 0.05   --weight_decay 0.0   --tau 0.9 --optimizer rmsprop --env_id bipedal_walker --time_limit 10 --dt 0.02 --normalize_state  --lr 0.01 --policy_lr 0.001 --c_entropy 0.0001 --n_step 20 --nb_true_epochs 20 --logdir ~/logdir

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