org.cloudbus.cloudsim.util

Class MathUtil

java.lang.Object

org.cloudbus.cloudsim.util.MathUtil

public class MathUtil
extends Object

A class containing multiple convenient math functions. To use some of the function you must download Michael Thomas Flanagan's Java Scientific Library: http://www.ee.ucl.ac.uk/~mflanaga/java/

Since:

CloudSim Toolkit 3.0

Author:

Anton Beloglazov

Constructor Summary

Constructors

Constructor and Description
MathUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static double[]	abs(double[] data) Abs.
static int	countNonZeroBeginning(double[] data) Count non zero beginning of the data.
static int	countShortestRow(double[][] data) Count shortest row.
static double[]	getLoessParameterEstimates(double[] y) Gets the loess parameter estimates.
static double[]	getRobustLoessParameterEstimates(double[] y) Gets the robust loess parameter estimates.
static double[]	getTricubeBisquareWeigts(double[] residuals) Gets the tricube bisquare weigts.
static double[]	getTricubeWeigts(int n) Gets the tricube weigts.
static double	iqr(double[] data) Gets the IQR.
static double[]	listToArray(List<? extends Number> list) List to array.
static double	mad(double[] data) Gets the mad.
static double	mean(List<Double> list) Gets the average.
static double	median(List<Double> list) Gets the median.
static double	stDev(List<Double> list) Gets the standard deviation.
static double	sum(List<? extends Number> list) Sums a list of numbers.
static double[]	trimZeroTail(double[] data) Trim zero tail.
static double	variance(List<Double> list) Variance.

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtil

public MathUtil()

Method Detail

sum

public static double sum(List<? extends Number> list)

Sums a list of numbers.

Parameters:

list - the list

Returns:

the double

listToArray

public static double[] listToArray(List<? extends Number> list)

List to array.

Parameters:

list - the list

Returns:

the double[]

median

public static double median(List<Double> list)

Gets the median.

Parameters:

list - the list

Returns:

the median

mean

public static double mean(List<Double> list)

Gets the average.

Parameters:

list - the list

Returns:

the average

variance

public static double variance(List<Double> list)

Variance.

Parameters:

list - the list

Returns:

the double

stDev

public static double stDev(List<Double> list)

Gets the standard deviation.

Parameters:

list - the list

Returns:

the double

mad

public static double mad(double[] data)

Gets the mad.

Parameters:

data - the data

Returns:

the mad

iqr

public static double iqr(double[] data)

Gets the IQR.

Parameters:

data - the data

Returns:

the IQR

countNonZeroBeginning

public static int countNonZeroBeginning(double[] data)

Count non zero beginning of the data.

Parameters:

data - the data

Returns:

the int

countShortestRow

public static int countShortestRow(double[][] data)

Count shortest row.

Parameters:

data - the data

Returns:

the int

trimZeroTail

public static double[] trimZeroTail(double[] data)

Trim zero tail.

Parameters:

data - the data

Returns:

the double[]

getLoessParameterEstimates

public static double[] getLoessParameterEstimates(double[] y)

Gets the loess parameter estimates.

Parameters:

y - the y

Returns:

the loess parameter estimates

getRobustLoessParameterEstimates

public static double[] getRobustLoessParameterEstimates(double[] y)

Gets the robust loess parameter estimates.

Parameters:

y - the y

Returns:

the robust loess parameter estimates

getTricubeWeigts

public static double[] getTricubeWeigts(int n)

Gets the tricube weigts.

Parameters:

n - the n

Returns:

the tricube weigts

getTricubeBisquareWeigts

public static double[] getTricubeBisquareWeigts(double[] residuals)

Gets the tricube bisquare weigts.

Parameters:

residuals - the residuals

Returns:

the tricube bisquare weigts

abs

public static double[] abs(double[] data)

Abs.

Parameters:

data - the data

Returns:

the double[]