Apache Commons Math 3.6.1 · org.apache.commons.math3.stat.descriptive

Generic univariate summary statistic objects.

UnivariateStatistic API Usage Examples:

UnivariateStatistic:

/∗ evaluation approach ∗/

  double[] values = new double[] { 1, 2, 3, 4, 5 };

  UnivariateStatistic stat = new Mean();

  out.println("mean = " + stat.evaluate(values));

StorelessUnivariateStatistic:

/∗ incremental approach ∗/

  double[] values = new double[] { 1, 2, 3, 4, 5 };

  StorelessUnivariateStatistic stat = new Mean();

  out.println("mean before adding a value is NaN = " + stat.getResult());

  for (int i = 0; i < values.length; i++) {

        stat.increment(values[i]);

        out.println("current mean = " + stat2.getResult());

  }

   stat.clear();

  out.println("mean after clear is NaN = " + stat.getResult());

Interface Summary

Modifier and Type	Interface and Description
public interface	StatisticalMultivariateSummary Reporting interface for basic multivariate statistics.
public interface	StatisticalSummary Reporting interface for basic univariate statistics.
public interface	StorelessUnivariateStatistic Extends the definition of `UnivariateStatistic` with `increment` and `incrementAll(double[])` methods for adding values and updating internal state.
public interface	UnivariateStatistic Base interface implemented by all statistics.
public interface	WeightedEvaluation Weighted evaluation for statistics.

Class Summary

Modifier and Type	Class and Description
public abstract class	AbstractStorelessUnivariateStatistic Abstract implementation of the `StorelessUnivariateStatistic` interface.
public abstract class	AbstractUnivariateStatistic Abstract base class for all implementations of the `UnivariateStatistic` interface.
public class	AggregateSummaryStatistics An aggregator for `SummaryStatistics` from several data sets or data set partitions.
public class	DescriptiveStatistics Maintains a dataset of values of a single variable and computes descriptive statistics based on stored data.
public class	MultivariateSummaryStatistics Computes summary statistics for a stream of n-tuples added using the `addValue` method.
public class	StatisticalSummaryValues Value object representing the results of a univariate statistical summary.
public class	SummaryStatistics Computes summary statistics for a stream of data values added using the `addValue` method.
public class	SynchronizedDescriptiveStatistics Implementation of `org.apache.commons.math3.stat.descriptive.DescriptiveStatistics` that is safe to use in a multithreaded environment.
public class	SynchronizedMultivariateSummaryStatistics Implementation of `org.apache.commons.math3.stat.descriptive.MultivariateSummaryStatistics` that is safe to use in a multithreaded environment.
public class	SynchronizedSummaryStatistics Implementation of `org.apache.commons.math3.stat.descriptive.SummaryStatistics` that is safe to use in a multithreaded environment.

Package org.apache.commons.math3.stat.descriptive

UnivariateStatistic API Usage Examples:

UnivariateStatistic:

StorelessUnivariateStatistic:

Interface Summary

Class Summary