This class implements random variate generators for the Cauchy distribution. More...
Inheritance diagram for CauchyGen:
Collaboration diagram for CauchyGen:
Public Member Functions | |
| CauchyGen (RandomStream s, double alpha, double beta) | |
Creates a Cauchy random variate generator with parameters \(\alpha=\) alpha and \(\beta\) = beta, using stream s. | |
| CauchyGen (RandomStream s) | |
Creates a Cauchy random variate generator with parameters \(\alpha=0 \) and \(\beta= 1\), using stream s. | |
| CauchyGen (RandomStream s, CauchyDist dist) | |
Create a new generator for the distribution dist, using stream s. | |
| double | getAlpha () |
| Returns the parameter \(\alpha\) of this object. | |
| double | getBeta () |
| Returns the parameter \(\beta\) of this object. | |
 Public Member Functions inherited from RandomVariateGen | |
| RandomVariateGen (RandomStream s, Distribution dist) | |
Creates a new random variate generator from the distribution dist, using stream s. More... | |
| double | nextDouble () |
| Generates a random number from the continuous distribution contained in this object. More... | |
| void | nextArrayOfDouble (double[] v, int start, int n) |
Generates n random numbers from the continuous distribution contained in this object. More... | |
| double [] | nextArrayOfDouble (int n) |
Generates n random numbers from the continuous distribution contained in this object, and returns them in a new array of size n. More... | |
| RandomStream | getStream () |
| Returns the umontreal.ssj.rng.RandomStream used by this generator. More... | |
| void | setStream (RandomStream stream) |
Sets the umontreal.ssj.rng.RandomStream used by this generator to stream. | |
| Distribution | getDistribution () |
| Returns the umontreal.ssj.probdist.Distribution used by this generator. More... | |
| String | toString () |
Returns a String containing information about the current generator. | |
Static Public Member Functions | |
| static double | nextDouble (RandomStream s, double alpha, double beta) |
Generates a new variate from the Cauchy distribution with parameters \(\alpha= \) alpha and \(\beta= \) beta, using stream s. | |
Protected Member Functions | |
| void | setParams (double alpha, double beta) |
Protected Attributes | |
| double | alpha |
| double | beta |
| Protected Attributes inherited from RandomVariateGen | |
| RandomStream | stream |
| Distribution | dist |
Detailed Description
This class implements random variate generators for the Cauchy distribution.
The density is (see, e.g., [99] p. 299):
\[ f (x) = \frac{\beta}{\pi[(x-\alpha)^2 + \beta^2]}, \qquad\mbox{for } -\infty< x < \infty, \tag{fcauchy} \]
where \(\beta> 0\).
The (non-static) nextDouble method simply calls inverseF on the distribution.
The documentation for this class was generated from the following file:
- CauchyGen.java
