org.deeplearning4j.nn.weights.WeightInitDistribution 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.
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* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
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* * SPDX-License-Identifier: Apache-2.0
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package org.deeplearning4j.nn.weights;
import lombok.EqualsAndHashCode;
import org.deeplearning4j.nn.conf.distribution.Distribution;
import org.deeplearning4j.nn.conf.distribution.Distributions;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.rng.distribution.impl.OrthogonalDistribution;
import org.nd4j.shade.jackson.annotation.JsonProperty;
@EqualsAndHashCode
public class WeightInitDistribution implements IWeightInit {
private final Distribution distribution;
public WeightInitDistribution(@JsonProperty("distribution") Distribution distribution) {
if(distribution == null) {
// Would fail later below otherwise
throw new IllegalArgumentException("Must set distribution!");
}
this.distribution = distribution;
}
@Override
public INDArray init(double fanIn, double fanOut, long[] shape, char order, INDArray paramView) {
//org.nd4j.linalg.api.rng.distribution.Distribution not serializable
org.nd4j.linalg.api.rng.distribution.Distribution dist = Distributions.createDistribution(distribution);
if (dist instanceof OrthogonalDistribution) {
dist.sample(paramView.reshape(order, shape));
} else {
dist.sample(paramView);
}
return paramView.reshape(order, shape);
}
}