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org.nd4j.linalg.api.ops.impl.accum.distances.EuclideanDistance Maven / Gradle / Ivy
/*-
*
* * 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.accum.distances;
import org.apache.commons.math3.util.FastMath;
import org.nd4j.linalg.api.complex.IComplexNumber;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseAccumulation;
import org.nd4j.linalg.api.ops.Op;
/**
* Euclidean distance
*
* @author Adam Gibson
*/
public class EuclideanDistance extends BaseAccumulation {
public EuclideanDistance() {}
public EuclideanDistance(INDArray x, INDArray y, INDArray z, long n) {
super(x, y, z, n);
extraArgs = new Object[2];
extraArgs[0] = 0.0f;
extraArgs[1] = 0.0f;
}
public EuclideanDistance(INDArray x, INDArray y, long n) {
super(x, y, n);
extraArgs = new Object[2];
extraArgs[0] = 0.0f;
extraArgs[1] = 0.0f;
}
public EuclideanDistance(INDArray x) {
super(x);
extraArgs = new Object[2];
extraArgs[0] = 0.0f;
extraArgs[1] = 0.0f;
}
public EuclideanDistance(INDArray x, INDArray y) {
super(x, y);
extraArgs = new Object[2];
extraArgs[0] = 0.0f;
extraArgs[1] = 0.0f;
}
public EuclideanDistance(INDArray x, INDArray y, boolean allDistances) {
this(x, y);
this.isComplex = allDistances;
}
public EuclideanDistance(INDArray x, INDArray y, INDArray z, boolean allDistances) {
this(x, y, z, x.lengthLong());
this.isComplex = allDistances;
}
@Override
public double update(double accum, double x) {
return accum + (x * x);
}
@Override
public double update(double accum, double x, double y) {
double d = (x - y);
return accum + d * d;
}
@Override
public float update(float accum, float x) {
return accum + (x * x);
}
@Override
public float update(float accum, float x, float y) {
float f = (x - y);
return accum + f * f;
}
@Override
public IComplexNumber update(IComplexNumber accum, double x) {
return accum;
}
@Override
public IComplexNumber update(IComplexNumber accum, double x, double y) {
double d = (x - y);
return accum.add(d * d);
}
@Override
public IComplexNumber update(IComplexNumber accum, IComplexNumber x) {
return accum;
}
@Override
public IComplexNumber update(IComplexNumber accum, IComplexNumber x, IComplexNumber y) {
IComplexNumber c = x.sub(y);
return accum.add(c.mul(c));
}
@Override
public IComplexNumber update(IComplexNumber accum, IComplexNumber x, double y) {
IComplexNumber c = x.sub(y);
return accum.add(c.mul(c));
}
@Override
public double combineSubResults(double first, double second) {
return first + second;
}
@Override
public float combineSubResults(float first, float second) {
return first + second;
}
@Override
public IComplexNumber combineSubResults(IComplexNumber first, IComplexNumber second) {
return first.add(second);
}
@Override
public int opNum() {
return 1;
}
@Override
public String name() {
return "euclidean";
}
@Override
public IComplexNumber op(IComplexNumber origin, double other) {
numProcessed++;
return origin.sub(other);
}
@Override
public IComplexNumber op(IComplexNumber origin, float other) {
numProcessed++;
return origin.sub(other);
}
@Override
public IComplexNumber op(IComplexNumber origin, IComplexNumber other) {
numProcessed++;
return origin.sub(other);
}
@Override
public float op(float origin, float other) {
numProcessed++;
return origin - other;
}
@Override
public double op(double origin, double other) {
numProcessed++;
return origin - other;
}
@Override
public double op(double origin) {
numProcessed++;
return origin;
}
@Override
public float op(float origin) {
numProcessed++;
return origin;
}
@Override
public IComplexNumber op(IComplexNumber origin) {
numProcessed++;
return origin;
}
@Override
public Op opForDimension(int index, int dimension) {
INDArray xForDimension = x.vectorAlongDimension(index, dimension);
EuclideanDistance ret;
if (y() != null)
ret = new EuclideanDistance(xForDimension, y.vectorAlongDimension(index, dimension),
xForDimension.length());
else
ret = new EuclideanDistance(x.vectorAlongDimension(index, dimension));
ret.setApplyFinalTransform(applyFinalTransform());
return ret;
}
@Override
public Op opForDimension(int index, int... dimension) {
INDArray xForDimension = x.tensorAlongDimension(index, dimension);
EuclideanDistance ret;
if (y() != null)
ret = new EuclideanDistance(xForDimension, y.tensorAlongDimension(index, dimension),
xForDimension.length());
else
ret = new EuclideanDistance(x.tensorAlongDimension(index, dimension));
ret.setApplyFinalTransform(applyFinalTransform());
return ret;
}
@Override
public double getAndSetFinalResult(double accum) {
if (applyFinalTransform()) {
double d = FastMath.sqrt(accum);
this.finalResult = d;
return d;
} else {
this.finalResult = accum;
return accum;
}
}
@Override
public float getAndSetFinalResult(float accum) {
if (applyFinalTransform) {
float f = (float) FastMath.sqrt(accum);
this.finalResult = f;
return f;
} else {
this.finalResult = accum;
return accum;
}
}
@Override
public IComplexNumber getAndSetFinalResult(IComplexNumber accum) {
this.finalResultComplex = accum.sqrt();
return finalResultComplex;
}
@Override
public double calculateFinalResult(double accum, long n) {
return FastMath.sqrt(accum);
}
@Override
public float calculateFinalResult(float accum, long n) {
return (float) FastMath.sqrt(accum);
}
}
