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/*-
*
* * Copyright 2015 Skymind,Inc.
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://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.
*
*
*/
package org.nd4j.linalg.api.ops.impl.indexaccum;
import org.nd4j.linalg.api.complex.IComplexNumber;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseIndexAccumulation;
import org.nd4j.linalg.api.ops.Op;
import org.nd4j.linalg.factory.Nd4j;
/**
* Calculate the index of min value over a vector
* @author Alex Black
*/
public class IMin extends BaseIndexAccumulation {
public IMin() {}
public IMin(INDArray x, INDArray y, long n) {
super(x, y, n);
}
public IMin(INDArray x) {
super(x);
}
public IMin(INDArray x, INDArray y) {
super(x, y);
}
@Override
public int update(double accum, int accumIdx, double x, int xIdx) {
return (accum <= x ? accumIdx : xIdx);
}
@Override
public int update(float accum, int accumIdx, float x, int xIdx) {
return (accum <= x ? accumIdx : xIdx);
}
@Override
public int update(double accum, int accumIdx, double x, double y, int idx) {
return (accum <= x ? accumIdx : idx);
}
@Override
public int update(float accum, int accumIdx, float x, float y, int idx) {
return (accum <= x ? accumIdx : idx);
}
@Override
public int update(IComplexNumber accum, int accumIdx, IComplexNumber x, int xIdx) {
return (accum.absoluteValue().doubleValue() <= x.absoluteValue().doubleValue() ? accumIdx : xIdx);
}
@Override
public int update(IComplexNumber accum, int accumIdx, double x, int idx) {
return (accum.absoluteValue().doubleValue() <= x ? accumIdx : idx);
}
@Override
public int update(IComplexNumber accum, int accumIdx, double x, double y, int idx) {
return (accum.absoluteValue().doubleValue() <= x ? accumIdx : idx);
}
public int update(IComplexNumber accum, int accumIdx, IComplexNumber x, IComplexNumber y, int idx) {
return (accum.absoluteValue().doubleValue() <= x.absoluteValue().doubleValue() ? accumIdx : idx);
}
@Override
public int opNum() {
return 1;
}
@Override
public String name() {
return "imin";
}
@Override
public IComplexNumber op(IComplexNumber origin, double other) {
return origin;
}
@Override
public IComplexNumber op(IComplexNumber origin, float other) {
return origin;
}
@Override
public IComplexNumber op(IComplexNumber origin, IComplexNumber other) {
return origin;
}
@Override
public float op(float origin, float other) {
return origin;
}
@Override
public double op(double origin, double other) {
return origin;
}
@Override
public double op(double origin) {
return origin;
}
@Override
public float op(float origin) {
return origin;
}
@Override
public IComplexNumber op(IComplexNumber origin) {
return origin;
}
@Override
public float zeroFloat() {
return Float.MAX_VALUE;
}
@Override
public double zeroDouble() {
return Double.MAX_VALUE;
}
@Override
public float zeroHalf() {
return 65503.0f;
}
@Override
public IComplexNumber zeroComplex() {
return Nd4j.createComplexNumber(Double.MAX_VALUE, 0);
}
@Override
public Op opForDimension(int index, int dimension) {
INDArray xAlongDimension = x.vectorAlongDimension(index, dimension);
if (y() != null)
return new IMin(xAlongDimension, y.vectorAlongDimension(index, dimension), xAlongDimension.length());
else
return new IMin(x.vectorAlongDimension(index, dimension));
}
@Override
public Op opForDimension(int index, int... dimension) {
INDArray xAlongDimension = x.tensorAlongDimension(index, dimension);
if (y() != null)
return new IMin(xAlongDimension, y.tensorAlongDimension(index, dimension), xAlongDimension.length());
else
return new IMin(x.tensorAlongDimension(index, dimension));
}
}