org.apache.mahout.cf.taste.impl.common
Interface RunningAverageAndStdDev

All Superinterfaces:
RunningAverage
All Known Implementing Classes:
FixedRunningAverageAndStdDev, FullRunningAverageAndStdDev, InvertedRunningAverageAndStdDev, WeightedRunningAverageAndStdDev

public interface RunningAverageAndStdDev
extends RunningAverage

Extends RunningAverage by adding standard deviation too.


Method Summary
 double getStandardDeviation()
           
 RunningAverageAndStdDev inverse()
           
 
Methods inherited from interface org.apache.mahout.cf.taste.impl.common.RunningAverage
addDatum, changeDatum, getAverage, getCount, removeDatum
 

Method Detail

getStandardDeviation

double getStandardDeviation()
Returns:
standard deviation of data

inverse

RunningAverageAndStdDev inverse()
Specified by:
inverse in interface RunningAverage
Returns:
a (possibly immutable) object whose average is the negative of this object's


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