org.nd4j.linalg.activations.BaseActivationFunction Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* 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.
*
* 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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.activations;
import org.nd4j.linalg.api.ndarray.INDArray;
import java.util.Arrays;
/**
* Base IActivation for activation functions without parameters
*
* @author Alex Black
*/
public abstract class BaseActivationFunction implements IActivation {
@Override
public int numParams(int inputSize) {
return 0;
}
@Override
public void setParametersViewArray(INDArray viewArray, boolean initialize) {
//No op
}
@Override
public INDArray getParametersViewArray() {
return null;
}
@Override
public void setGradientViewArray(INDArray viewArray) {
//No op
}
@Override
public INDArray getGradientViewArray() {
return null;
}
protected void assertShape(INDArray in, INDArray epsilon){
if(!in.equalShapes(epsilon)){
throw new IllegalStateException("Shapes must be equal during backprop: in.shape{} = " + Arrays.toString(in.shape())
+ ", epsilon.shape() = " + Arrays.toString(epsilon.shape()));
}
}
}