org.deeplearning4j.nn.weights.WeightInitVarScalingUniformFanAvg Maven / Gradle / Ivy
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* *
* * This program and the accompanying materials are made available under the
* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * Unless required by applicable law or agreed to in writing, software
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* * SPDX-License-Identifier: Apache-2.0
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*/
package org.deeplearning4j.nn.weights;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.factory.Nd4j;
/**
* Uniform U[-a,a] with a=3.0/((fanIn + fanOut)/2)
*
* @author Adam Gibson
*/
@Data
@NoArgsConstructor
public class WeightInitVarScalingUniformFanAvg implements IWeightInit {
private Double scale;
public WeightInitVarScalingUniformFanAvg(Double scale){
this.scale = scale;
}
@Override
public INDArray init(double fanIn, double fanOut, long[] shape, char order, INDArray paramView) {
double scalingFanAvg = 3.0 / Math.sqrt((fanIn + fanOut) / 2);
if(scale != null)
scalingFanAvg *= scale;
Nd4j.rand(paramView, Nd4j.getDistributions().createUniform(-scalingFanAvg, scalingFanAvg));
return paramView.reshape(order, shape);
}
}