com.datumbox.framework.core.mathematics.regularization

Class L1Regularizer

java.lang.Object

com.datumbox.framework.core.mathematics.regularization.L1Regularizer

public class L1Regularizer
extends java.lang.Object

Utility class for L1 regularization. https://www.cs.ubc.ca/~murphyk/Teaching/CS540-Fall08/L13.pdf http://www.aclweb.org/anthology/P09-1054

Constructor Summary

Constructors

Constructor and Description
L1Regularizer()

Method Summary

Modifier and Type	Method and Description
static <K> double	estimatePenalty(double l1, java.util.Map<K,java.lang.Double> weights) Estimates the penalty by adding the L1 regularization.
static <K> void	updateWeights(double l1, double learningRate, java.util.Map<K,java.lang.Double> weights, java.util.Map<K,java.lang.Double> newWeights) Updates the weights by applying the L1 regularization.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

L1Regularizer

public L1Regularizer()

Method Detail

updateWeights

public static <K> void updateWeights(double l1,
                                     double learningRate,
                                     java.util.Map<K,java.lang.Double> weights,
                                     java.util.Map<K,java.lang.Double> newWeights)

Updates the weights by applying the L1 regularization.

Type Parameters:

K -

Parameters:

l1 -

learningRate -

weights -

newWeights -

estimatePenalty

public static <K> double estimatePenalty(double l1,
                                         java.util.Map<K,java.lang.Double> weights)

Estimates the penalty by adding the L1 regularization.

Type Parameters:

K -

Parameters:

l1 -

weights -

Returns: