com.elikill58.negativity.api.maths.mathcollection

Class ProbabilityDistributions

java.lang.Object

com.elikill58.negativity.api.maths.mathcollection.ProbabilityDistributions

public final class ProbabilityDistributions
extends Object

ProbabilityDistributions - random number generators, PDF - Probability Distribution Functions, CDF - Cumulative Distribution Functions, QNT - Quantile Functions (Inverse Cumulative Distribution Functions).

Field Summary

Fields

Modifier and Type	Field and Description
static Random	randomGenerator Random number generator

Constructor Summary

Constructors

Constructor and Description
ProbabilityDistributions()

Method Summary

Modifier and Type	Method and Description
static double	rndInteger(int a, int b, Random rnd) Random number from Uniform Discrete distribution. over set interval (a, a+1, ..., b-1, b).
static int	rndInteger(Random rnd) Random integer.
static double	rndNormal(double mean, double stddev, Random rnd) Random number from normal distribution N(mean, stddev).
static double	rndUniformContinuous(Random rnd) Random number from Uniform Continuous distribution over interval [0, 1).

Methods inherited from class java.lang.Object

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

Field Detail

randomGenerator

public static Random randomGenerator

Random number generator

Constructor Detail

ProbabilityDistributions

public ProbabilityDistributions()

Method Detail

rndUniformContinuous

public static final double rndUniformContinuous(Random rnd)

Random number from Uniform Continuous distribution over interval [0, 1).

Parameters:

rnd - Random number generator.

Returns:

Random number.

rndInteger

public static final double rndInteger(int a,
                                      int b,
                                      Random rnd)

Random number from Uniform Discrete distribution. over set interval (a, a+1, ..., b-1, b).

Parameters:

a - Interval limit - left / lower.

b - Interval limit - right / upper.

rnd - Random number generator.

Returns:

Double.NaN if a or b is null, or b is lower than a - otherwise returns random number.

rndInteger

public static final int rndInteger(Random rnd)

Random integer.

Parameters:

rnd - Random number generator.

Returns:

Returns random number.

rndNormal

public static final double rndNormal(double mean,
                                     double stddev,
                                     Random rnd)

Random number from normal distribution N(mean, stddev).

Parameters:

mean - Mean value.

stddev - Standard deviation.

rnd - Random number generator.

Returns:

Double.NaN if mean or stddev or rnd is null or stddev is lower than 0 - otherwise random number.