org.apache.mahout.cf.taste.impl.common
Class CompactRunningAverageAndStdDev
java.lang.Object
org.apache.mahout.cf.taste.impl.common.CompactRunningAverage
org.apache.mahout.cf.taste.impl.common.CompactRunningAverageAndStdDev
- All Implemented Interfaces:
- java.io.Serializable, RunningAverage, RunningAverageAndStdDev
public final class CompactRunningAverageAndStdDev
- extends CompactRunningAverage
- implements RunningAverageAndStdDev
Extends CompactRunningAverage
to add a running standard deviation computation.
- See Also:
- Serialized Form
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
CompactRunningAverageAndStdDev
public CompactRunningAverageAndStdDev()
getStandardDeviation
public double getStandardDeviation()
- Specified by:
getStandardDeviation
in interface RunningAverageAndStdDev
- Returns:
- standard deviation of data
addDatum
public void addDatum(double datum)
- Specified by:
addDatum
in interface RunningAverage
- Overrides:
addDatum
in class CompactRunningAverage
- Parameters:
datum
- new item to add to the running average
removeDatum
public void removeDatum(double datum)
- Specified by:
removeDatum
in interface RunningAverage
- Overrides:
removeDatum
in class CompactRunningAverage
- Parameters:
datum
- item to remove to the running average
changeDatum
public void changeDatum(double delta)
- Specified by:
changeDatum
in interface RunningAverage
- Overrides:
changeDatum
in class CompactRunningAverage
- Parameters:
delta
- amount by which to change a datum in the running average
- Throws:
java.lang.UnsupportedOperationException
toString
public java.lang.String toString()
- Overrides:
toString
in class CompactRunningAverage
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