org.nd4j.linalg.api.ops.impl.reduce.longer.CountNonZero 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.reduce.longer;
import lombok.NoArgsConstructor;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseReduceLongOp;
import java.util.Collections;
import java.util.List;
/**
* Count the number of non-zero elements
*
* @author Max Pumperla
*/
@NoArgsConstructor
public class CountNonZero extends BaseReduceLongOp {
public CountNonZero(SameDiff sameDiff, SDVariable input, int... dimensions) {
super(sameDiff, input, dimensions);
}
public CountNonZero(INDArray x, int... dimensions) {
super(x, dimensions);
}
@Override
public int opNum() {
return 0;
}
@Override
public String opName() {
return "countNonZero";
}
@Override
public List doDiff(List f1) {
return Collections.singletonList(f().zerosLike(arg()));
}
}