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Java example source code file (SgdUpdater.java)

This example Java source code file (SgdUpdater.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

baseupdater, gradientupdater, indarray, layer, override, sgdaggregator, sgdupdater, updateraggregator, util

The SgdUpdater.java Java example source code

package org.deeplearning4j.nn.updater;

import org.deeplearning4j.nn.api.Layer;
import org.deeplearning4j.nn.api.Updater;
import org.deeplearning4j.nn.updater.aggregate.UpdaterAggregator;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.learning.GradientUpdater;

import java.util.LinkedHashMap;

/**
 * @author Adam Gibson
 */
public class SgdUpdater extends BaseUpdater {


    @Override
    public void init() {

    }

    @Override
    public GradientUpdater init(String variable, INDArray gradient, Layer layer) {
        org.nd4j.linalg.learning.Sgd updater = (org.nd4j.linalg.learning.Sgd) updaterForVariable.get(variable);
        if(updater == null) {
            updater = new org.nd4j.linalg.learning.Sgd(layer.conf().getLearningRateByParam(variable));
            updaterForVariable.put(variable,updater);
        }

        return updater;
    }

    @Override
    public UpdaterAggregator getAggregator(boolean addThis){
        SgdAggregator ag = new SgdAggregator();
        if(addThis) ag.aggregate(this);
        return ag;
    }

    protected static class SgdAggregator extends BaseUpdater.UpdaterAggregatorImpl {
        @Override
        public Updater getUpdater() {
            return setUpdaterState(new SgdUpdater());
        }
    }
}

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