at.tuwien.ifs.somtoolbox.layers.metrics
Class CosineMetric
java.lang.Object
at.tuwien.ifs.somtoolbox.layers.metrics.AbstractMetric
at.tuwien.ifs.somtoolbox.layers.metrics.CosineMetric
- All Implemented Interfaces:
- DistanceMetric, Comparable<DistanceMetric>
public class CosineMetric
- extends AbstractMetric
Implements the cosine metric, defined for two vectors d1 and d2 as d1xd2 / (|d1|*|d2|).
- Version:
- $Id: CosineMetric.java 3358 2010-02-11 14:35:07Z mayer $
- Author:
- Rudolf Mayer
Method Summary |
double |
distance(double[] vector1,
double[] vector2)
Calculates the distance between two vectors provided by argument vector1 and vector2 . |
double |
distance(cern.colt.matrix.DoubleMatrix1D vector1,
cern.colt.matrix.DoubleMatrix1D vector2)
Calculates the distance between two vectors provided by argument vector1 and vector2 . |
static void |
main(String[] args)
Main method to test the metric. |
String |
toString()
|
Methods inherited from class at.tuwien.ifs.somtoolbox.layers.metrics.AbstractMetric |
checkDimensions, checkDimensions, compareTo, distance, distance, distance, distance, distance, distance, distance, instantiate, instantiateNice, meanVector, performanceTest, setMetricParams, transformValue, transformVector |
CosineMetric
public CosineMetric()
distance
public double distance(double[] vector1,
double[] vector2)
throws MetricException
- Description copied from interface:
DistanceMetric
- Calculates the distance between two vectors provided by argument
vector1
and vector2
. A
MetricException
is thrown, if the dimensionalities of the two vectors differ.
- Specified by:
distance
in interface DistanceMetric
- Specified by:
distance
in class AbstractMetric
- Parameters:
vector1
- first vector.vector2
- second vector.
- Returns:
- the distance between
vector1
and vector2
.
- Throws:
MetricException
- if the dimensionalities of the two vectors differ.- See Also:
DistanceMetric.distance(double[], double[])
distance
public double distance(cern.colt.matrix.DoubleMatrix1D vector1,
cern.colt.matrix.DoubleMatrix1D vector2)
throws MetricException
- Description copied from interface:
DistanceMetric
- Calculates the distance between two vectors provided by argument
vector1
and vector2
. A
MetricException
is thrown, if the dimensionalities of the two vectors differ.
- Specified by:
distance
in interface DistanceMetric
- Overrides:
distance
in class AbstractMetric
- Parameters:
vector1
- first vector.vector2
- second vector.
- Returns:
- the distance between
vector1
and vector2
.
- Throws:
MetricException
- if the dimensionalities of the two vectors differ.- See Also:
DistanceMetric.distance(cern.colt.matrix.DoubleMatrix1D,
cern.colt.matrix.DoubleMatrix1D)
toString
public String toString()
- Overrides:
toString
in class Object
main
public static void main(String[] args)
throws MetricException
- Main method to test the metric.
- Throws:
MetricException