org.nd4j.linalg.learning.SgdUpdater Maven / Gradle / Ivy

/*-
 *
 *  * Copyright 2017 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 *
 *
 */

package org.nd4j.linalg.learning;

import lombok.Data;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.learning.config.Sgd;

/**
 * SGD updater applies a learning rate only
 * @author Adam Gibson
 */
@Data
public class SgdUpdater implements GradientUpdater {

    private final Sgd config;

    public SgdUpdater(Sgd config){
        this.config = config;
    }

    @Override
    public void setStateViewArray(INDArray viewArray, int[] gradientShape, char gradientOrder, boolean initialize) {
        //No op
    }

    @Override
    public void applyUpdater(INDArray gradient, int iteration) {
        gradient.muli(config.getLearningRate());
    }
}