org.nd4j.linalg.api.ops.impl.transforms.MaxOut Maven / Gradle / Ivy
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* 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.api.ops.impl.transforms;
import lombok.val;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseTransformOp;
import org.nd4j.linalg.api.shape.LongShapeDescriptor;
import org.nd4j.linalg.exception.ND4JIllegalStateException;
import org.nd4j.linalg.factory.Nd4j;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Max out activation:
* https://arxiv.org/pdf/1302.4389.pdf
*
* @author Adam Gibson
*/
public class MaxOut extends BaseTransformOp {
private Number max = Double.NaN;
public MaxOut(SameDiff sameDiff, SDVariable i_v, boolean inPlace, Number max) {
super(sameDiff, i_v, inPlace);
this.max = max;
}
public MaxOut(SameDiff sameDiff, SDVariable i_v, Object[] extraArgs, Number max) {
super(sameDiff, i_v, extraArgs);
this.max = max;
}
public MaxOut() {}
public MaxOut(INDArray x, INDArray z) {
super(x, z);
}
public MaxOut(INDArray x) {
super(x);
}
@Override
public int opNum() {
throw new UnsupportedOperationException();
}
@Override
public String opName() {
return "maxout";
}
@Override
public String onnxName() {
throw new NoOpNameFoundException("No onnx op opName found for " + opName());
}
@Override
public String tensorflowName() {
throw new NoOpNameFoundException("Tensorflow name not found for " + opName());
//return "Maxout";
}
@Override
public List doDiff(List f1) {
return null;
}
@Override
public DataType resultType() {
return Nd4j.defaultFloatingPointType();
}
@Override
public Type getOpType() {
return Type.TRANSFORM_STRICT;
}
@Override
public boolean validateDataTypes(boolean experimentalMode) {
if (!x().isR())
return false;
if (y() != null && !y().isR())
return false;
if (z() != null && z().dataType() != x().dataType())
return false;
return true;
}
@Override
public List calculateOutputShape() {
val ret = new ArrayList(1);
if(arg() == null)
throw new ND4JIllegalStateException("No arg found for op!");
val arr = sameDiff.getArrForVarName(arg().name());
if(arr == null)
return Collections.emptyList();
ret.add(LongShapeDescriptor.fromShape(arr.shape(), Nd4j.defaultFloatingPointType()));
return ret;
}
}