RMSprop.sc

README.ipynb

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MIT License

Copyright (c) 2017 ThoughtWorks Inc.

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RMSprop.sc

trait RMSprop extends INDArrayWeights {

  trait INDArrayWeightApi extends super.INDArrayWeightApi {
    this: INDArrayWeight =>
    var cache: INDArray = Nd4j.zeros(data.shape: _*)
  }

  override type INDArrayWeight <: INDArrayWeightApi with Weight

  trait INDArrayOptimizerApi extends super.INDArrayOptimizerApi {
    this: INDArrayOptimizer =>
    def eps: scala.Double = 1e-4

    def decayRate: scala.Double = 0.99

    abstract override lazy val delta: INDArray = {
      import org.nd4s.Implicits._
      import weight._
      cache = cache * decayRate + super.delta * super.delta * (1.0 - decayRate)
      super.delta / (Transforms.sqrt(cache) + eps)
    }
  }

  override type INDArrayOptimizer <: INDArrayOptimizerApi with Optimizer
}