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java.lang.Objectorg.apache.mahout.clustering.canopy.CanopyClusterer
public class CanopyClusterer
Constructor Summary | |
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CanopyClusterer(org.apache.hadoop.conf.Configuration config)
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CanopyClusterer(DistanceMeasure measure,
double t1,
double t2)
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Method Summary | |
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void |
addPointToCanopies(Vector point,
Collection<Canopy> canopies)
This is the same algorithm as the reference but inverted to iterate over existing canopies instead of the points. |
boolean |
canopyCovers(Canopy canopy,
Vector point)
Return if the point is covered by the canopy |
void |
config(DistanceMeasure aMeasure,
double aT1,
double aT2)
Configure the Canopy for unit tests |
void |
configure(org.apache.hadoop.conf.Configuration configuration)
Configure the Canopy and its distance measure |
static List<Canopy> |
createCanopies(List<Vector> points,
DistanceMeasure measure,
double t1,
double t2)
Iterate through the points, adding new canopies. |
static List<Vector> |
getCenters(Iterable<Canopy> canopies)
Iterate through the canopies, adding their centroids to a list |
double |
getT1()
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double |
getT2()
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double |
getT3()
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double |
getT4()
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static void |
updateCentroids(Iterable<Canopy> canopies)
Iterate through the canopies, resetting their center to their centroids |
void |
useT3T4()
Used by CanopyReducer to set t1=t3 and t2=t4 configuration values |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public CanopyClusterer(DistanceMeasure measure, double t1, double t2)
public CanopyClusterer(org.apache.hadoop.conf.Configuration config)
Method Detail |
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public double getT1()
public double getT2()
public double getT3()
public double getT4()
public void configure(org.apache.hadoop.conf.Configuration configuration)
configuration
- the Configurationpublic void useT3T4()
public void config(DistanceMeasure aMeasure, double aT1, double aT2)
aMeasure
- the DistanceMeasureaT1
- the T1 distance thresholdaT2
- the T2 distance thresholdpublic void addPointToCanopies(Vector point, Collection<Canopy> canopies)
point
- the point to be addedcanopies
- the Listpublic boolean canopyCovers(Canopy canopy, Vector point)
point
- a point
public static List<Canopy> createCanopies(List<Vector> points, DistanceMeasure measure, double t1, double t2)
points
- a listmeasure
- a DistanceMeasure to uset1
- the T1 distance thresholdt2
- the T2 distance threshold
public static List<Vector> getCenters(Iterable<Canopy> canopies)
canopies
- a Listpublic static void updateCentroids(Iterable<Canopy> canopies)
canopies
- a List
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