org.nd4j.linalg.api.ops.impl.transforms.custom.IsStrictlyIncreasing 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.api.ops.impl.transforms.custom;
import lombok.NonNull;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.base.Preconditions;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import java.util.Collections;
import java.util.List;
/**
* This op takes 1 n-dimensional array as input,
* and returns true if for every adjacent pair we have x[i] < x[i+1].
*
*/
public class IsStrictlyIncreasing extends DynamicCustomOp {
public IsStrictlyIncreasing() {}
public IsStrictlyIncreasing( SameDiff sameDiff, SDVariable[] args, boolean inPlace) {
super(null, sameDiff, args, inPlace);
}
public IsStrictlyIncreasing(@NonNull INDArray input){
this(input, null);
}
public IsStrictlyIncreasing(@NonNull INDArray input, INDArray output) {
super(null, new INDArray[]{input}, wrapOrNull(output));
}
@Override
public String opName() {
return "is_strictly_increasing";
}
@Override
public List doDiff(List f1) {
return Collections.singletonList(sameDiff.zerosLike(arg()));
}
@Override
public List calculateOutputDataTypes(List dataTypes){
Preconditions.checkState(dataTypes != null && dataTypes.size() == 1, "Expected exactly 1 input datatypes for %s, got %s", getClass(), dataTypes);
return Collections.singletonList(DataType.BOOL);
}
}