|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectsim.util.distribution.AbstractDistribution
sim.util.distribution.AbstractContinousDistribution
sim.util.distribution.Exponential
public class Exponential
Exponential Distribution (aka Negative Exponential Distribution); See the math definition animated definition.
p(x) = lambda*exp(-x*lambda) for x >= 0, lambda > 0.
Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.
Field Summary | |
---|---|
protected double |
lambda
|
Fields inherited from class sim.util.distribution.AbstractDistribution |
---|
randomGenerator |
Constructor Summary | |
---|---|
Exponential(double lambda,
MersenneTwisterFast randomGenerator)
Constructs a Negative Exponential distribution. |
Method Summary | |
---|---|
double |
cdf(double x)
Returns the cumulative distribution function. |
double |
nextDouble()
Returns a random number from the distribution. |
double |
nextDouble(double lambda)
Returns a random number from the distribution; bypasses the internal state. |
double |
pdf(double x)
Returns the probability distribution function. |
void |
setState(double lambda)
Sets the mean. |
java.lang.String |
toString()
Returns a String representation of the receiver. |
Methods inherited from class sim.util.distribution.AbstractDistribution |
---|
apply, apply, getRandomGenerator, nextInt, setRandomGenerator |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
protected double lambda
Constructor Detail |
---|
public Exponential(double lambda, MersenneTwisterFast randomGenerator)
Method Detail |
---|
public double cdf(double x)
public double nextDouble()
nextDouble
in class AbstractDistribution
public double nextDouble(double lambda)
public double pdf(double x)
public void setState(double lambda)
public java.lang.String toString()
toString
in class java.lang.Object
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |