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Poisson1 Class Reference

Inheritance diagram for Poisson1:

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Collaboration diagram for Poisson1:

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Public Member Functions

 Poisson1 (Real)
Real Density (Real) const
Real Next ()
ExtReal Mean () const
ExtReal Variance () const

Private Attributes

Real mu
Real ln_mu

Constructor & Destructor Documentation

Poisson1::Poisson1 (  Real   ) 
 

Definition at line 416 of file newran.cpp.

References ln_mu, and mu. 

00416                            : AsymGen(mux)      // Constructor
00417 { mu=mux; ln_mu=log(mu); }

Member Function Documentation

Real Poisson1::Density (  Real   )  const [virtual]
 

Reimplemented from Random.

Definition at line 419 of file newran.cpp.

References ln_gamma(), and Real. 

00420 {
00421    if (x < 0.0) return 0.0;
00422    double ix = floor(x);                         // use integer part
00423    double l = ln_mu * ix - mu - ln_gamma(1.0 + ix);
00424    return  (l < -40.0) ? 0.0 : exp(l);
00425 }

ExtReal Poisson1::Mean (   )  const [inline, virtual]
 

Reimplemented from AsymGen.

Definition at line 42 of file newran.cpp. 

00042 { return mu; }

Real Poisson1::Next (   )  [inline, virtual]
 

Reimplemented from AsymGen.

Definition at line 41 of file newran.cpp.

References AsymGen::Next(), and Real. 

00041 { return floor(AsymGen::Next()); }

ExtReal Poisson1::Variance (   )  const [inline, virtual]
 

Reimplemented from AsymGen.

Definition at line 43 of file newran.cpp. 

00043 { return mu; }

Field Documentation

Real Poisson1::ln_mu [private]
 

Definition at line 37 of file newran.cpp.

Referenced by Poisson1().

Real Poisson1::mu [private]
 

Definition at line 37 of file newran.cpp.

Referenced by Poisson1().

The documentation for this class was generated from the following file:
Generated on Fri Dec 5 04:06:31 2003 for Borqueror by doxygen 1.3.3