org.apache.commons.math.stat.descriptive
Interface StatisticalSummary

All Known Implementing Classes:
DescriptiveStatistics, StatisticalSummaryValues, SummaryStatistics

public interface StatisticalSummary

Reporting interface for basic univariate statistics.

Version:
$Revision: 155427 $ $Date: 2005-02-26 06:11:52 -0700 (Sat, 26 Feb 2005) $

Method Summary
 double getMax()
          Returns the maximum of the available values
 double getMean()
          Returns the arithmetic mean of the available values
 double getMin()
          Returns the minimum of the available values
 long getN()
          Returns the number of available values
 double getStandardDeviation()
          Returns the standard deviation of the available values.
 double getSum()
          Returns the sum of the values that have been added to Univariate.
 double getVariance()
          Returns the variance of the available values.
 

Method Detail

getMean

public double getMean()
Returns the arithmetic mean of the available values

Returns:
The mean or Double.NaN if no values have been added.

getVariance

public double getVariance()
Returns the variance of the available values.

Returns:
The variance, Double.NaN if no values have been added or 0.0 for a single value set.

getStandardDeviation

public double getStandardDeviation()
Returns the standard deviation of the available values.

Returns:
The standard deviation, Double.NaN if no values have been added or 0.0 for a single value set.

getMax

public double getMax()
Returns the maximum of the available values

Returns:
The max or Double.NaN if no values have been added.

getMin

public double getMin()
Returns the minimum of the available values

Returns:
The min or Double.NaN if no values have been added.

getN

public long getN()
Returns the number of available values

Returns:
The number of available values

getSum

public double getSum()
Returns the sum of the values that have been added to Univariate.

Returns:
The sum or Double.NaN if no values have been added


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