Esempi in C++ (Cpp) per esl_rnd_Gamma

Esempio n. 1

File: esl_gamma.c Progetto: TuftsBCB/SMURFBuild

/* Function:  esl_gam_Sample()
 * Incept:    SRE, Mon Nov 14 13:40:46 2005 [HHMI HQ]
 *
 * Purpose:   Sample a gamma-distributed random variate.
 */
double
esl_gam_Sample(ESL_RANDOMNESS *r, double mu, double lambda, double tau)
{
  double x;

  x = esl_rnd_Gamma(r, tau);
  return (mu + x / lambda);
} 

Esempio n. 2

File: esl_stretchexp.c Progetto: nathanweeks/easel

/* Function:  esl_sxp_Sample()
 *
 * Purpose:   Sample a stretched exponential random variate,
 *            by a change of variable from a Gamma sample.
 */
double
esl_sxp_Sample(ESL_RANDOMNESS *r, double mu, double lambda, double tau)
{
  double t,x;

  t = esl_rnd_Gamma(r, 1./tau);
  x = mu + 1./lambda * exp(1./tau * log(t));
  return x;
}