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.
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*
*/
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, int epoch) {
double lr = config.getLearningRate(iteration, epoch);
gradient.muli(lr);
}
}