87 lines
2.9 KiB
Markdown
87 lines
2.9 KiB
Markdown
# RL4J: Reinforcement Learning for Java
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RL4J is a reinforcement learning framework integrated with deeplearning4j and released under an Apache 2.0 open-source license. By contributing code to this repository, you agree to make your contribution available under an Apache 2.0 license.
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* DQN (Deep Q Learning with double DQN)
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* Async RL (A3C, Async NStepQlearning)
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Both for Low-Dimensional (array of info) and high-dimensional (pixels) input.
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Here is a useful blog post I wrote to introduce you to reinforcement learning, DQN and Async RL:
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[Blog post](https://rubenfiszel.github.io/posts/rl4j/2016-08-24-Reinforcement-Learning-and-DQN.html)
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[Examples](https://github.com/eclipse/deeplearning4j-examples/tree/master/rl4j-examples)
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[Cartpole example](https://github.com/eclipse/deeplearning4j-examples/blob/master/rl4j-examples/src/main/java/org/deeplearning4j/examples/rl4j/Cartpole.java)
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# Disclaimer
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This is a tech preview and distributed as is.
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Comments are welcome on our gitter channel:
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[gitter](https://gitter.im/deeplearning4j/deeplearning4j)
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# Quickstart
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** INSTALL rl4j-api before installing all (see below)!**
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* mvn install -pl rl4j-api
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* [if you want rl4j-gym too] Download and mvn install: [gym-java-client](https://github.com/eclipse/deeplearning4j/tree/master/gym-java-client)
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* mvn install
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# Visualisation
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[webapp-rl4j](https://github.com/rubenfiszel/webapp-rl4j)
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# Quicktry cartpole:
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* Install [gym-http-api](https://github.com/openai/gym-http-api).
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* launch http api server.
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* run with this [main](https://github.com/rubenfiszel/rl4j-examples/blob/master/src/main/java/org/deeplearning4j/rl4j/Cartpole.java)
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# Doom
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Doom is not ready yet but you can make it work if you feel adventurous with some additional steps:
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* You will need vizdoom, compile the native lib and move it into the root of your project in a folder
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* export MAVEN_OPTS=-Djava.library.path=THEFOLDEROFTHELIB
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* mvn compile exec:java -Dexec.mainClass="YOURMAINCLASS"
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# Malmo (Minecraft)
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* Download and unzip Malmo from [here](https://github.com/Microsoft/malmo/releases)
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* export MALMO_HOME=YOURMALMO_FOLDER
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* export MALMO_XSD_PATH=$MALMO_HOME/Schemas
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* launch malmo per [instructions](https://github.com/Microsoft/malmo#launching-minecraft-with-our-mod)
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* run with this [main](https://github.com/eclipse/deeplearning4j-examples/blob/master/rl4j-examples/src/main/java/org/deeplearning4j/examples/rl4j/MalmoPixels.java)
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# WIP
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* Documentation
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* Serialization/Deserialization (load save)
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* Compression of pixels in order to store 1M state in a reasonnable amount of memory
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* Async learning: A3C and nstep learning (requires some missing features from dl4j (calc and apply gradients)).
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# Author
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[Ruben Fiszel](http://rubenfiszel.github.io/)
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# Proposed contribution area:
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* Continuous control
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* Policy Gradient
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* Update gym-java-client when gym-http-api gets compatible with pixels environments to play with Pong, Doom, etc ..
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