Rcpp Version 0.12.12
rweibull.h
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1 // -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
2 //
3 // rweibull.h: Rcpp R/C++ interface class library --
4 //
5 // Copyright (C) 2010 - 2016 Douglas Bates, Dirk Eddelbuettel and Romain Francois
6 //
7 // This file is part of Rcpp.
8 //
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21 
22 #ifndef Rcpp__stats__random_rweibull_h
23 #define Rcpp__stats__random_rweibull_h
24 
25 namespace Rcpp {
26 namespace stats {
27 
28 class WeibullGenerator : public ::Rcpp::Generator<double> {
29 public:
30 
31  WeibullGenerator( double shape_, double scale_ ) :
32  shape_inv( 1/shape_), scale(scale_) {}
33 
34  inline double operator()() const {
35  return scale * ::R_pow(-::log(unif_rand()), shape_inv );
36  }
37 
38 private:
39  double shape_inv, scale ;
40 };
41 
43 public:
44 
45  WeibullGenerator__scale1( double shape_ ) :
46  shape_inv( 1/shape_) {}
47 
48  inline double operator()() const {
49  return ::R_pow(-::log(unif_rand()), shape_inv );
50  }
51 
52 private:
53  double shape_inv ;
54 };
55 
56 } // stats
57 } // Rcpp
58 
59 #endif
double operator()() const
Definition: rweibull.h:34
WeibullGenerator__scale1(double shape_)
Definition: rweibull.h:45
WeibullGenerator(double shape_, double scale_)
Definition: rweibull.h:31
double unif_rand(void)
Definition: Rmath.h:31
void log(InputIterator begin, InputIterator end, OutputIterator out)
Definition: algorithm.h:469
Rcpp API.
Definition: algo.h:28