Package cern.jet.random

Class Uniform

java.lang.Object
cern.colt.PersistentObject
cern.jet.random.AbstractDistribution
cern.jet.random.AbstractContinousDistribution
cern.jet.random.Uniform
All Implemented Interfaces:
DoubleFunction, IntFunction, Serializable, Cloneable
public class Uniform
extends AbstractContinousDistribution
Uniform distribution; Math definition and animated definition.

Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.

Static methods operate on a default uniform random number generator; they are synchronized.

Version:
1.0, 09/24/99
Author:
wolfgang.hoschek@cern.ch
See Also:
Serialized Form

  • Field Summary

    Fields 
    Modifier and Type Field Description
    protected double max  
    protected double min  
    protected static Uniform shared  

    Fields inherited from class cern.jet.random.AbstractDistribution

    randomGenerator

  • Constructor Summary

    Constructors 
    Constructor Description
    Uniform​(double min, double max, int seed)
    Constructs a uniform distribution with the given minimum and maximum, using a MersenneTwister seeded with the given seed.
    Uniform​(double min, double max, RandomEngine randomGenerator)
    Constructs a uniform distribution with the given minimum and maximum.
    Uniform​(RandomEngine randomGenerator)
    Constructs a uniform distribution with min=0.0 and max=1.0.

  • Method Summary

    Modifier and Type Method Description
    double cdf​(double x)
    Returns the cumulative distribution function (assuming a continous uniform distribution).
    boolean nextBoolean()
    Returns a uniformly distributed random boolean.
    double nextDouble()
    Returns a uniformly distributed random number in the open interval (min,max) (excluding min and max).
    double nextDoubleFromTo​(double from, double to)
    Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to).
    float nextFloatFromTo​(float from, float to)
    Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to).
    int nextInt()
    Returns a uniformly distributed random number in the closed interval [min,max] (including min and max).
    int nextIntFromTo​(int from, int to)
    Returns a uniformly distributed random number in the closed interval [from,to] (including from and to).
    long nextLongFromTo​(long from, long to)
    Returns a uniformly distributed random number in the closed interval [from,to] (including from and to).
    double pdf​(double x)
    Returns the probability distribution function (assuming a continous uniform distribution).
    void setState​(double min, double max)
    Sets the internal state.
    static boolean staticNextBoolean()
    Returns a uniformly distributed random boolean.
    static double staticNextDouble()
    Returns a uniformly distributed random number in the open interval (0,1) (excluding 0 and 1).
    static double staticNextDoubleFromTo​(double from, double to)
    Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to).
    static float staticNextFloatFromTo​(float from, float to)
    Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to).
    static int staticNextIntFromTo​(int from, int to)
    Returns a uniformly distributed random number in the closed interval [from,to] (including from and to).
    static long staticNextLongFromTo​(long from, long to)
    Returns a uniformly distributed random number in the closed interval [from,to] (including from and to).
    static void staticSetRandomEngine​(RandomEngine randomGenerator)
    Sets the uniform random number generation engine shared by all static methods.
    String toString()
    Returns a String representation of the receiver.

    Methods inherited from class cern.jet.random.AbstractDistribution

    apply, apply, clone, getRandomGenerator, makeDefaultGenerator, setRandomGenerator

    Methods inherited from class java.lang.Object

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

  • Field Details

    • min

      protected double min

    • max

      protected double max

    • shared

      protected static Uniform shared

  • Constructor Details

    • Uniform

      public Uniform​(double min, double max, int seed)
      Constructs a uniform distribution with the given minimum and maximum, using a MersenneTwister seeded with the given seed.

    • Uniform

      public Uniform​(double min, double max, RandomEngine randomGenerator)
      Constructs a uniform distribution with the given minimum and maximum.

    • Uniform

      public Uniform​(RandomEngine randomGenerator)
      Constructs a uniform distribution with min=0.0 and max=1.0.

  • Method Details

    • cdf

      public double cdf​(double x)
      Returns the cumulative distribution function (assuming a continous uniform distribution).

    • nextBoolean

      public boolean nextBoolean()
      Returns a uniformly distributed random boolean.

    • nextDouble

      public double nextDouble()
      Returns a uniformly distributed random number in the open interval (min,max) (excluding min and max).
      Specified by:
      nextDouble in class AbstractDistribution

    • nextDoubleFromTo

      public double nextDoubleFromTo​(double from, double to)
      Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to). Pre conditions: from <= to.

    • nextFloatFromTo

      public float nextFloatFromTo​(float from, float to)
      Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to). Pre conditions: from <= to.

    • nextInt

      public int nextInt()
      Returns a uniformly distributed random number in the closed interval [min,max] (including min and max).
      Overrides:
      nextInt in class AbstractDistribution

    • nextIntFromTo

      public int nextIntFromTo​(int from, int to)
      Returns a uniformly distributed random number in the closed interval [from,to] (including from and to). Pre conditions: from <= to.

    • nextLongFromTo

      public long nextLongFromTo​(long from, long to)
      Returns a uniformly distributed random number in the closed interval [from,to] (including from and to). Pre conditions: from <= to.

    • pdf

      public double pdf​(double x)
      Returns the probability distribution function (assuming a continous uniform distribution).

    • setState

      public void setState​(double min, double max)
      Sets the internal state.

    • staticNextBoolean

      public static boolean staticNextBoolean()
      Returns a uniformly distributed random boolean.

    • staticNextDouble

      public static double staticNextDouble()
      Returns a uniformly distributed random number in the open interval (0,1) (excluding 0 and 1).

    • staticNextDoubleFromTo

      public static double staticNextDoubleFromTo​(double from, double to)
      Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to). Pre conditions: from <= to.

    • staticNextFloatFromTo

      public static float staticNextFloatFromTo​(float from, float to)
      Returns a uniformly distributed random number in the open interval (from,to) (excluding from and to). Pre conditions: from <= to.

    • staticNextIntFromTo

      public static int staticNextIntFromTo​(int from, int to)
      Returns a uniformly distributed random number in the closed interval [from,to] (including from and to). Pre conditions: from <= to.

    • staticNextLongFromTo

      public static long staticNextLongFromTo​(long from, long to)
      Returns a uniformly distributed random number in the closed interval [from,to] (including from and to). Pre conditions: from <= to.

    • staticSetRandomEngine

      public static void staticSetRandomEngine​(RandomEngine randomGenerator)
      Sets the uniform random number generation engine shared by all static methods.
      Parameters:
      randomGenerator - the new uniform random number generation engine to be shared.

    • toString

      public String toString()
      Returns a String representation of the receiver.
      Overrides:
      toString in class Object