cern.jet.random
Class Zeta
java.lang.Object
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+--cern.colt.PersistentObject
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+--cern.jet.random.AbstractDistribution
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+--cern.jet.random.AbstractDiscreteDistribution
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+--cern.jet.random.Zeta
- All Implemented Interfaces:
- Cloneable, DoubleFunction, IntFunction, Serializable
- public class Zeta
- extends AbstractDiscreteDistribution
Zeta distribution.
Valid parameter ranges: ro > 0 and pk >= 0.
If either ro > 100 or k > 10000 numerical problems in
computing the theoretical moments arise, therefore ro <= 100 and
k <= 10000 are recommended.
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.
Implementation:
Method: Acceptance/Rejection.
High performance implementation.
This is a port and adaption of Zeta.c from the C-RAND / WIN-RAND library.
C-RAND's implementation, in turn, is based upon
J. Dagpunar (1988): Principles of Random Variate Generation, Clarendon Press, Oxford.
- See Also:
- Serialized Form
Constructor Summary |
Zeta(double ro,
double pk,
RandomElement randomGenerator)
Constructs a Zeta distribution. |
Method Summary |
int |
nextInt()
Returns a random number from the distribution. |
void |
setState(double ro,
double pk)
Sets the parameters. |
static int |
staticNextInt(double ro,
double pk)
Returns a random number from the distribution. |
String |
toString()
Returns a String representation of the receiver. |
Zeta
public Zeta(double ro,
double pk,
RandomElement randomGenerator)
- Constructs a Zeta distribution.
nextInt
public int nextInt()
- Returns a random number from the distribution.
- Overrides:
nextInt
in class AbstractDiscreteDistribution
setState
public void setState(double ro,
double pk)
- Sets the parameters.
staticNextInt
public static int staticNextInt(double ro,
double pk)
- Returns a random number from the distribution.
toString
public String toString()
- Returns a String representation of the receiver.
- Overrides:
toString
in class Object
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