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java.lang.Objectimagescience.random.BinomialGenerator
public class BinomialGenerator
Binomial random number generator. This implementation is based on the algorithm described by W. H. Press, S. A. Teukolsky, W. T. Vetterling, B. P. Flannery, Numerical Recipes in C: The Art of Scientific Computing (2nd edition), Cambridge University Press, Cambridge, 1992, Section 7.3, and uses UniformGenerator
as a source of uniform random numbers.
Constructor Summary | |
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BinomialGenerator()
Constructs a generator of random numbers from the binomial distribution with one trial of probability 0.5 and initialized with a random seed. |
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BinomialGenerator(int seed)
Constructs a generator of random numbers from the binomial distribution with one trial of probability 0.5 and initialized with the given seed . |
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BinomialGenerator(int trials,
double probability)
Constructs a generator of random numbers from the binomial distribution with given number of trials of given probability and initialized with a random seed. |
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BinomialGenerator(int trials,
double probability,
int seed)
Constructs a generator of random numbers from the binomial distribution with given number of trials of given probability and initialized with the given seed . |
Method Summary | |
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double |
next()
Returns a random number from the binomial distribution with number of trials and probability specified at construction. |
double |
next(int trials,
double probability)
Returns a random number from the binomial distribution with given number of trials of given probability . |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public BinomialGenerator()
0.5
and initialized with a random seed.
public BinomialGenerator(int seed)
0.5
and initialized with the given seed
.
seed
- The seed used for initialization of the generator.public BinomialGenerator(int trials, double probability)
trials
of given probability
and initialized with a random seed.
trials
- The number of trials. Must be larger than or equal to 0
.probability
- The probability for each trial. Must be in the range [0,1]
.
java.lang.IllegalArgumentException
- If trials
is less than 0
, or if probability
is outside the range [0,1]
.public BinomialGenerator(int trials, double probability, int seed)
trials
of given probability
and initialized with the given seed
.
trials
- The number of trials. Must be larger than or equal to 0
.probability
- The probability for each trial. Must be in the range [0,1]
.seed
- The seed used for initialization of the generator.
java.lang.IllegalArgumentException
- If trials
is less than 0
, or if probability
is outside the range [0,1]
.Method Detail |
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public double next()
next
in interface RandomGenerator
public double next(int trials, double probability)
trials
of given probability
.
trials
- The number of trials. Must be larger than or equal to 0
.probability
- The probability for each trial. Must be in the range [0,1]
.
trials
of given probability
.
java.lang.IllegalArgumentException
- If trials
is less than 0
, or if probability
is outside the range [0,1]
.
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Copyright (C) Erik Meijering. Permission to use this software and corresponding documentation for educational, research, and not-for-profit purposes, without a fee and without a signed licensing agreement, is granted, subject to the following terms and conditions.
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