org.nd4j.weightinit.impl.ReluUniformInitScheme Maven / Gradle / Ivy
package org.nd4j.weightinit.impl;
import lombok.Builder;
import org.apache.commons.math3.util.FastMath;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.weightinit.BaseWeightInitScheme;
import org.nd4j.weightinit.WeightInit;
/**
* Initialize the weight to:
* U(-sqrt(6/fanIn), sqrt(6/fanIn)
*
* @author Adam Gibson
*/
public class ReluUniformInitScheme extends BaseWeightInitScheme {
private double fanIn;
@Builder
public ReluUniformInitScheme(char order, double fanIn) {
super(order);
this.fanIn = fanIn;
}
@Override
public INDArray doCreate(int[] shape, INDArray paramsView) {
double u = Math.sqrt(6.0 / fanIn);
return Nd4j.rand(shape, Nd4j.getDistributions().createUniform(-u, u)); //U(-sqrt(6/fanIn), sqrt(6/fanIn)
}
@Override
public WeightInit type() {
return WeightInit.RELU_UNIFORM;
}
}