Trait

org.apache.flink.ml.optimization

RegularizationPenalty

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trait RegularizationPenalty extends Serializable

Represents a type of regularization penalty

Regularization penalties are used to restrict the optimization problem to solutions with certain desirable characteristics, such as sparsity for the L1 penalty, or penalizing large weights for the L2 penalty.

The regularization term, R(w) is added to the objective function, f(w) = L(w) + lambda*R(w) where lambda is the regularization parameter used to tune the amount of regularization applied.

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Abstract Value Members

  1. abstract def regLoss(oldLoss: Double, weightVector: Vector, regularizationConstant: Double): Double

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    Adds regularization to the loss value

    Adds regularization to the loss value

    oldLoss

    The loss to be updated

    weightVector

    The weights used to update the loss

    regularizationConstant

    The regularization parameter to be applied

    returns

    Updated loss

  2. abstract def takeStep(weightVector: Vector, gradient: Vector, regularizationConstant: Double, learningRate: Double): Vector

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    Calculates the new weights based on the gradient and regularization penalty

    Calculates the new weights based on the gradient and regularization penalty

    Weights are updated using the gradient descent step w - learningRate * gradient with w being the weight vector.

    weightVector

    The weights to be updated

    gradient

    The gradient used to update the weights

    regularizationConstant

    The regularization parameter to be applied

    learningRate

    The effective step size for this iteration

    returns

    Updated weights

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