org.neuroph.util

Class DataSetStatistics

java.lang.Object

org.neuroph.util.DataSetStatistics

public class DataSetStatistics
extends Object

This class calculates statistics for data set.

Author:

Arsenovic Aleksandar

Field Summary

Fields

Modifier and Type	Field and Description
static String	FREQ
static String	MAX
static String	MEAN
static String	MIN
static String	STD_DEV
static String	SUM
static String	VAR

Constructor Summary

Constructors

Constructor and Description
DataSetStatistics(DataSet dataSet)

Method Summary

Modifier and Type	Method and Description
void	calculateStatistics() Calculates basic statistics by columns of the dataset.
DataSet	getDataSet() Get original data set.
double[]	getFrequency() Get data set frequency for nominal columns.
double[]	getMax() Get maximum for each data set column.
double[]	getMean() Get mean for each data set column.
double[]	getMin() Get minimum for each data set column.
double[]	getStdDev() Get standard deviation for each data set column.
double[]	getVar() Get variant for each data set column.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MIN

public static final String MIN

See Also:

Constant Field Values

MAX

public static final String MAX

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Constant Field Values

MEAN

public static final String MEAN

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Constant Field Values

SUM

public static final String SUM

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Constant Field Values

STD_DEV

public static final String STD_DEV

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Constant Field Values

VAR

public static final String VAR

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Constant Field Values

FREQ

public static final String FREQ

See Also:

Constant Field Values

Constructor Detail

DataSetStatistics

public DataSetStatistics(DataSet dataSet)

Method Detail

calculateStatistics

public void calculateStatistics()

Calculates basic statistics by columns of the dataset.

getDataSet

public DataSet getDataSet()

Get original data set.

Returns:

Original dataset.

getMean

public double[] getMean()

Get mean for each data set column.

Returns:

Array of means by columns.

getMax

public double[] getMax()

Get maximum for each data set column.

Returns:

Array of maximums by columns.

getMin

public double[] getMin()

Get minimum for each data set column.

Returns:

Array of minimums by columns.

getVar

public double[] getVar()

Get variant for each data set column.

Returns:

Array of variants by columns.

getStdDev

public double[] getStdDev()

Get standard deviation for each data set column.

Returns:

Array of standard deviations by columns.

getFrequency

public double[] getFrequency()

Get data set frequency for nominal columns. Returns -0.0 for numeric columns.

Returns:

Array of frequencies by columns.