org.apache.mahout.math.hadoop.stats
Class VarianceTotals

java.lang.Object
  extended by org.apache.mahout.math.hadoop.stats.VarianceTotals

public final class VarianceTotals
extends Object

Holds the total values needed to compute mean and standard deviation Provides methods for their computation


Constructor Summary
VarianceTotals()
           
 
Method Summary
 double computeMean()
           
 double computeVariance()
           
 double computeVarianceForGivenMean(double mean)
           
 double getSum()
           
 double getSumOfSquares()
           
 double getTotalCount()
           
 void setSum(double sum)
           
 void setSumOfSquares(double sumOfSquares)
           
 void setTotalCount(double totalCount)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

VarianceTotals

public VarianceTotals()
Method Detail

getSumOfSquares

public double getSumOfSquares()

setSumOfSquares

public void setSumOfSquares(double sumOfSquares)

getSum

public double getSum()

setSum

public void setSum(double sum)

getTotalCount

public double getTotalCount()

setTotalCount

public void setTotalCount(double totalCount)

computeMean

public double computeMean()

computeVariance

public double computeVariance()

computeVarianceForGivenMean

public double computeVarianceForGivenMean(double mean)


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