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java.lang.Objectcern.colt.PersistentObject
cern.jet.random.AbstractDistribution
cern.jet.random.AbstractContinousDistribution
cern.jet.random.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 | 
| Fields inherited from class cern.colt.PersistentObject | 
| serialVersionUID | 
| Constructor Summary | |
| Exponential(double lambda,
            RandomEngine 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. | 
| static double | staticNextDouble(double lambda)Returns a random number from the distribution with the given lambda. | 
|  String | toString()Returns a String representation of the receiver. | 
| Methods inherited from class cern.jet.random.AbstractDistribution | 
| apply, apply, clone, makeDefaultGenerator, nextInt | 
| Methods inherited from class java.lang.Object | 
| equals, getClass, hashCode, notify, notifyAll, wait, wait, wait | 
| Constructor Detail | 
public Exponential(double lambda,
                   RandomEngine randomGenerator)
| Method Detail | 
public double cdf(double x)
public double nextDouble()
nextDouble in class AbstractDistributionpublic double nextDouble(double lambda)
public double pdf(double x)
public void setState(double lambda)
public static double staticNextDouble(double lambda)
public String toString()
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