Binomial1 Class Reference

Inheritance diagram for Binomial1:

[legend]Collaboration diagram for Binomial1:

[legend]

Public Member Functions
	Binomial1 (int nx, Real px)
Real	Density (Real) const
Real	Next ()
ExtReal	Mean () const
ExtReal	Variance () const
Private Attributes
Real	p
Real	q
Real	ln_p
Real	ln_q
Real	ln_n_fac
int	n

---

Constructor & Destructor Documentation

Binomial1::Binomial1 (  int  nx, Real  px )

Definition at line 427 of file newran.cpp. References ln_gamma(), ln_n_fac, ln_p, ln_q, n, p, and q. : AsymGen((nx + 1) * px), p(px), q(1.0 - px), n(nx) { ln_p = log(p); ln_q = log(q); ln_n_fac = ln_gamma(n+1); }

---

Member Function Documentation

Real Binomial1::Density (  Real   )  const [virtual]

Reimplemented from Random. Definition at line 431 of file newran.cpp. References ln_gamma(), and Real. { double ix = floor(x); // use integer part if (ix < 0.0 || ix > n) return 0.0; double l = ln_n_fac - ln_gamma(ix+1) - ln_gamma(n-ix+1) + ix * ln_p + (n-ix) * ln_q; return (l < -40.0) ? 0.0 : exp(l); }

ExtReal Binomial1::Mean (   )  const [inline, virtual]

Reimplemented from AsymGen. Definition at line 95 of file newran.cpp. { return p * n; }

Real Binomial1::Next (   )  [inline, virtual]

Reimplemented from AsymGen. Definition at line 94 of file newran.cpp. References AsymGen::Next(), and Real. { return floor(AsymGen::Next()); }

ExtReal Binomial1::Variance (   )  const [inline, virtual]

Reimplemented from AsymGen. Definition at line 96 of file newran.cpp. { return p * q * n; }

---

Field Documentation

Real Binomial1::ln_n_fac [private]

Definition at line 90 of file newran.cpp. Referenced by Binomial1().

Real Binomial1::ln_p [private]

Definition at line 90 of file newran.cpp. Referenced by Binomial1().

Real Binomial1::ln_q [private]

Definition at line 90 of file newran.cpp. Referenced by Binomial1().

int Binomial1::n [private]

Definition at line 90 of file newran.cpp. Referenced by Binomial1().

Real Binomial1::p [private]

Definition at line 90 of file newran.cpp. Referenced by Binomial1().

Real Binomial1::q [private]

Definition at line 90 of file newran.cpp. Referenced by Binomial1().

---

The documentation for this class was generated from the following file:

• newran.cpp

---