public class RandomTools extends Object
Constructor and Description |
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RandomTools() |
Modifier and Type | Method and Description |
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static int |
binomial(int n,
double p,
Random rnd)
Returns a pseudorandom number drawn from binomial distribution B(n, p).
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static double |
exponential(Random rnd)
Returns a pseudorandom number drawn from exponential distribution with
mean 1.
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static Set<Integer> |
randomKsubset(int n,
int k,
Set<Integer> subset,
Random rnd)
Generates a pseudorandom subset of size k of the set {0, 1,...
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static Set<Integer> |
randomPsubset(int n,
double p,
Set<Integer> subset,
Random rnd)
Generates a pseudorandom subset of the set {0, 1,...
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public static double exponential(Random rnd)
rnd
- source of randomnesspublic static int binomial(int n, double p, Random rnd)
n
- number of triesp
- success probabilityrnd
- source of randomnesspublic static Set<Integer> randomKsubset(int n, int k, Set<Integer> subset, Random rnd)
n
- the size of the initial setk
- the size of the generated setsubset
- if not null, this set is cleared and the result is stored
here. This avoids creations of sets at each call of this
methodrnd
- source of randomnesspublic static Set<Integer> randomPsubset(int n, double p, Set<Integer> subset, Random rnd)
n
- the size of the initial setp
- the probability to choose each elementsubset
- if not null, this set is cleared and the result is stored
here. This avoids creations of sets at each call of this
methodrnd
- source of randomnessCopyright © 2015. All rights reserved.