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## umontreal.iro.lecuyer.randvar
Class ParetoGen

    java.lang.Object
      umontreal.iro.lecuyer.randvar.RandomVariateGen
          umontreal.iro.lecuyer.randvar.ParetoGen

    public class ParetoGen

extends RandomVariateGen

This class implements random variate generators for one of the Pareto distributions, with parameters α > 0 and β > 0. Its density function is

f (x) = αβαx-(α-1) for x > β, 0 otherwise.

The (non-static) `nextDouble` method simply calls `inverseF` on the distribution.

Constructor Summary
`ParetoGen(RandomStream s, double alpha)` Creates a Pareto random variate generator with parameters α = `alpha` and β = 1, using stream `s`.
`ParetoGen(RandomStream s, double alpha, double beta)` Creates a Pareto random variate generator with parameters α = `alpha` and β = `beta`, using stream `s`.
`ParetoGen(RandomStream s, ParetoDist dist)` Creates a new generator for the Pareto distribution `dist` and stream `s`.

Method Summary
`double` | `getAlpha()` Returns the parameter α of this object.
`double` | `getBeta()` Returns the parameter β of this object.
`static double` | `nextDouble(RandomStream s, double alpha, double beta)` Generates a new variate from the Pareto distribution with parameters α = `alpha` and β = `beta`, using stream `s`.

Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGen
`getDistribution, getStream, nextArrayOfDouble, nextDouble, setStream`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ParetoGen

    public ParetoGen(RandomStream s,
                     double alpha,
                     double beta)

  Creates a Pareto random variate generator with parameters α = `alpha` and β = `beta`, using stream `s`.

### ParetoGen

    public ParetoGen(RandomStream s,
                     double alpha)

  Creates a Pareto random variate generator with parameters α = `alpha` and β = 1, using stream `s`.

### ParetoGen

    public ParetoGen(RandomStream s,
                     ParetoDist dist)

  Creates a new generator for the Pareto distribution `dist` and stream `s`.

Method Detail

### nextDouble

    public static double nextDouble(RandomStream s,
                                    double alpha,
                                    double beta)

  Generates a new variate from the Pareto distribution with parameters α = `alpha` and β = `beta`, using stream `s`.

### getAlpha

    public double getAlpha()

  Returns the parameter α of this object.

### getBeta

    public double getBeta()

  Returns the parameter β of this object.

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To submit a bug or ask questions, send an e-mail to Pierre L'Ecuyer.