PerformanceStats

java.lang.Object
- weka.core.neighboursearch.PerformanceStats

All Implemented Interfaces:

java.io.Serializable, AdditionalMeasureProducer, RevisionHandler

Direct Known Subclasses:

TreePerformanceStats
```
public class PerformanceStats
extends java.lang.Object
implements AdditionalMeasureProducer, java.io.Serializable, RevisionHandler
```
The class that measures the performance of a nearest neighbour search (NNS) algorithm.

Version:

$Revision: 10141 $

Author:

Ashraf M. Kibriya (amk14[at-the-rate]cs[dot]waikato[dot]ac[dot]nz)

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`double`	`m_CoordCount` The number of coordinates looked at for the current/last query.
`double`	`m_MaxC` The min and max coordinates(attributes) looked at per query.
`double`	`m_MaxP` The min and max data points looked for a query by the NNS algorithm.
`double`	`m_MinC` The min and max coordinates(attributes) looked at per query.
`double`	`m_MinP` The min and max data points looked for a query by the NNS algorithm.
`double`	`m_PointCount` The number of data points looked at for the current/last query.
`double`	`m_SumC` The sum of coordinates/attributes looked at for all the queries.
`double`	`m_SumP` The sum of data points looked at for all the queries.
`double`	`m_SumSqC` The squared sum of coordinates/attributes looked at for all the queries.
`double`	`m_SumSqP` The squared sum of data points looked at for all the queries.

Constructor Summary

Constructors
Constructor and Description

PerformanceStats()
default constructor.

Constructors
Constructor and Description
`PerformanceStats()` default constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.util.Enumeration<java.lang.String>`	`enumerateMeasures()` Returns an enumeration of the additional measure names.
`double`	`getMaxCoordsPerPoint()` Returns the maximum of coords per point.
`double`	`getMaxPointsVisited()` Returns the maximum of points visited.
`double`	`getMeanCoordsPerPoint()` Returns the mean of coords per point.
`double`	`getMeanPointsVisited()` Returns the mean of points visited.
`double`	`getMeasure(java.lang.String additionalMeasureName)` Returns the value of the named measure.
`double`	`getMinCoordsPerPoint()` Returns the minimum of coords per point.
`double`	`getMinPointsVisited()` Returns the minimum of points visited.
`int`	`getNumQueries()` Returns the number of queries.
`java.lang.String`	`getRevision()` Returns the revision string.
`java.lang.String`	`getStats()` Returns a string representation of the statistics.
`double`	`getStdDevCoordsPerPoint()` Returns the standard deviation of coords per point.
`double`	`getStdDevPointsVisited()` Returns the standard deviation of points visited.
`double`	`getTotalCoordsPerPoint()` Returns the total sum of coords per point.
`double`	`getTotalPointsVisited()` Returns the total number of points visited.
`void`	`incrCoordCount()` Increments the coordinate count (number of coordinates/attributes looked at).
`void`	`incrPointCount()` Increments the point count (number of datapoints looked at).
`void`	`reset()` Resets all internal fields/counters.
`void`	`searchFinish()` Signals end of the nearest neighbour search.
`void`	`searchStart()` Signals start of the nearest neighbour search.
`void`	`updatePointCount(int n)` adds the given number to the point count.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - m_MinP
```
public double m_MinP
```
    The min and max data points looked for a query by the NNS algorithm.
  - m_MaxP
```
public double m_MaxP
```
    The min and max data points looked for a query by the NNS algorithm.
  - m_SumP
```
public double m_SumP
```
    The sum of data points looked at for all the queries.
  - m_SumSqP
```
public double m_SumSqP
```
    The squared sum of data points looked at for all the queries.
  - m_PointCount
```
public double m_PointCount
```
    The number of data points looked at for the current/last query.
  - m_MinC
```
public double m_MinC
```
    The min and max coordinates(attributes) looked at per query.
  - m_MaxC
```
public double m_MaxC
```
    The min and max coordinates(attributes) looked at per query.
  - m_SumC
```
public double m_SumC
```
    The sum of coordinates/attributes looked at for all the queries.
  - m_SumSqC
```
public double m_SumSqC
```
    The squared sum of coordinates/attributes looked at for all the queries.
  - m_CoordCount
```
public double m_CoordCount
```
    The number of coordinates looked at for the current/last query.
- Constructor Detail
  - PerformanceStats
```
public PerformanceStats()
```
    default constructor.
- Method Detail
  - reset
```
public void reset()
```
    Resets all internal fields/counters.
  - searchStart
```
public void searchStart()
```
    Signals start of the nearest neighbour search. Initializes the stats object.
  - searchFinish
```
public void searchFinish()
```
    Signals end of the nearest neighbour search. Calculates the statistics for the search.
  - incrPointCount
```
public void incrPointCount()
```
    Increments the point count (number of datapoints looked at).
  - incrCoordCount
```
public void incrCoordCount()
```
    Increments the coordinate count (number of coordinates/attributes looked at).
  - updatePointCount
```
public void updatePointCount(int n)
```
    adds the given number to the point count.
    
    Parameters:
    
    n - The number to add to the point count.
  - getNumQueries
```
public int getNumQueries()
```
    Returns the number of queries.
    
    Returns:
    
    The number of queries.
  - getTotalPointsVisited
```
public double getTotalPointsVisited()
```
    Returns the total number of points visited.
    
    Returns:
    
    The total number.
  - getMeanPointsVisited
```
public double getMeanPointsVisited()
```
    Returns the mean of points visited.
    
    Returns:
    
    The mean points visited.
  - getStdDevPointsVisited
```
public double getStdDevPointsVisited()
```
    Returns the standard deviation of points visited.
    
    Returns:
    
    The standard deviation.
  - getMinPointsVisited
```
public double getMinPointsVisited()
```
    Returns the minimum of points visited.
    
    Returns:
    
    The minimum.
  - getMaxPointsVisited
```
public double getMaxPointsVisited()
```
    Returns the maximum of points visited.
    
    Returns:
    
    The maximum.
  - getTotalCoordsPerPoint
```
public double getTotalCoordsPerPoint()
```
    Returns the total sum of coords per point.
    
    Returns:
    
    The total per point.
  - getMeanCoordsPerPoint
```
public double getMeanCoordsPerPoint()
```
    Returns the mean of coords per point.
    
    Returns:
    
    The mean.
  - getStdDevCoordsPerPoint
```
public double getStdDevCoordsPerPoint()
```
    Returns the standard deviation of coords per point.
    
    Returns:
    
    The standard deviation.
  - getMinCoordsPerPoint
```
public double getMinCoordsPerPoint()
```
    Returns the minimum of coords per point.
    
    Returns:
    
    The minimum.
  - getMaxCoordsPerPoint
```
public double getMaxCoordsPerPoint()
```
    Returns the maximum of coords per point.
    
    Returns:
    
    The maximum.
  - enumerateMeasures
```
public java.util.Enumeration<java.lang.String> enumerateMeasures()
```
    Returns an enumeration of the additional measure names.
    
    Specified by:
    
    enumerateMeasures in interface AdditionalMeasureProducer
    
    Returns:
    
    An enumeration of the measure names.
  - getMeasure
```
public double getMeasure(java.lang.String additionalMeasureName)
                  throws java.lang.IllegalArgumentException
```
    Returns the value of the named measure.
    
    Specified by:
    
    getMeasure in interface AdditionalMeasureProducer
    
    Parameters:
    
    additionalMeasureName - The name of the measure to query for its value.
    
    Returns:
    
    The value of the named measure.
    
    Throws:
    
    java.lang.IllegalArgumentException - If the named measure is not supported.
  - getStats
```
public java.lang.String getStats()
```
    Returns a string representation of the statistics.
    
    Returns:
    
    The statistics as string.
  - getRevision
```
public java.lang.String getRevision()
```
    Returns the revision string.
    
    Specified by:
    
    getRevision in interface RevisionHandler
    
    Returns:
    
    the revision

Class PerformanceStats

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

m_MinP

m_MaxP

m_SumP

m_SumSqP

m_PointCount

m_MinC

m_MaxC

m_SumC

m_SumSqC

m_CoordCount

Constructor Detail

PerformanceStats

Method Detail

reset

searchStart

searchFinish

incrPointCount

incrCoordCount

updatePointCount

getNumQueries

getTotalPointsVisited

getMeanPointsVisited

getStdDevPointsVisited

getMinPointsVisited

getMaxPointsVisited

getTotalCoordsPerPoint

getMeanCoordsPerPoint

getStdDevCoordsPerPoint

getMinCoordsPerPoint

getMaxCoordsPerPoint

enumerateMeasures

getMeasure

getStats

getRevision