48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
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/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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package org.deeplearning4j.optimize.stepfunctions;
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import org.deeplearning4j.optimize.api.StepFunction;
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import org.nd4j.linalg.api.ndarray.INDArray;
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import org.nd4j.linalg.factory.Nd4j;
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/**
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* Default step function
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* @author Adam Gibson
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*/
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public class DefaultStepFunction implements StepFunction {
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private static final long serialVersionUID = -4707790524365648985L;
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/**Does x = x + stepSize * line
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* @param step step size.
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*/
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@Override
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public void step(INDArray parameters, INDArray searchDirection, double step) {
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Nd4j.getBlasWrapper().level1().axpy(searchDirection.length(), step, searchDirection, parameters);
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}
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@Override
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public void step(INDArray x, INDArray line) {
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step(x, line, 1.0);
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}
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@Override
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public void step() {
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throw new UnsupportedOperationException();
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}
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}
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