|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.apache.mahout.math.function.DoubleFunction
org.apache.mahout.math.jet.random.AbstractDistribution
org.apache.mahout.math.jet.random.AbstractContinousDistribution
org.apache.mahout.math.jet.random.Exponential
public class Exponential
Constructor Summary | |
---|---|
Exponential(double lambda,
Random randomGenerator)
Provides a negative exponential distribution given a rate parameter lambda and an underlying random number generator. |
Method Summary | |
---|---|
double |
cdf(double x)
Returns the cumulative distribution function. |
double |
nextDouble()
Returns a random number from the distribution. |
double |
pdf(double x)
Returns the value of the probability density function at a particular point. |
void |
setState(double lambda)
Sets the rate parameter. |
String |
toString()
Returns a String representation of the receiver. |
Methods inherited from class org.apache.mahout.math.jet.random.AbstractContinousDistribution |
---|
nextInt |
Methods inherited from class org.apache.mahout.math.jet.random.AbstractDistribution |
---|
apply, apply, getRandomGenerator, randomDouble, setRandomGenerator |
Methods inherited from class org.apache.mahout.math.function.DoubleFunction |
---|
isDensifying |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
---|
public Exponential(double lambda, Random randomGenerator)
lambda
- The rate parameter of the distribution.randomGenerator
- The PRNG that is used to generate values.Method Detail |
---|
public double cdf(double x)
cdf
in class AbstractContinousDistribution
x
- The point at which the cumulative distribution function is to be evaluated.
public double nextDouble()
nextDouble
in class AbstractDistribution
public double pdf(double x)
pdf
in class AbstractContinousDistribution
x
- The point at which the probability density function is to be evaluated.
public void setState(double lambda)
lambda
- The new value of the rate parameter.public String toString()
toString
in class Object
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |