Rcpp Version 0.12.12
rlnorm.h
Go to the documentation of this file.
1 // -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
2 //
3 // rlnorm.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 //
9 // Rcpp is free software: you can redistribute it and/or modify it
10 // under the terms of the GNU General Public License as published by
11 // the Free Software Foundation, either version 2 of the License, or
12 // (at your option) any later version.
13 //
14 // Rcpp is distributed in the hope that it will be useful, but
15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
18 //
19 // You should have received a copy of the GNU General Public License
20 // along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
21 
22 #ifndef Rcpp__stats__random_rlnorm_h
23 #define Rcpp__stats__random_rlnorm_h
24 
25 namespace Rcpp {
26 namespace stats {
27 
28 class LNormGenerator : public Generator<double> {
29 public:
30 
31  LNormGenerator( double meanlog_ = 0.0 , double sdlog_ = 1.0 ) :
32  meanlog(meanlog_), sdlog(sdlog_) {}
33 
34  inline double operator()() const {
35  return ::exp( meanlog + sdlog * ::norm_rand() ) ;
36  }
37 
38 private:
39  double meanlog ;
40  double sdlog ;
41 };
42 
43 
44 class LNormGenerator_1 : public Generator<double> {
45 public:
46 
47  LNormGenerator_1( double meanlog_ = 0.0 ) :
48  meanlog(meanlog_) {}
49 
50  inline double operator()() const {
51  return ::exp( meanlog + ::norm_rand() ) ;
52  }
53 
54 private:
55  double meanlog ;
56 };
57 
58 
59 class LNormGenerator_0 : public Generator<double> {
60 public:
61 
63 
64  inline double operator()() const {
65  return ::exp(::norm_rand() ) ;
66  }
67 
68 };
69 
70 } // stats
71 } // Rcpp
72 
73 #endif
void exp(InputIterator begin, InputIterator end, OutputIterator out)
Definition: algorithm.h:474
LNormGenerator(double meanlog_=0.0, double sdlog_=1.0)
Definition: rlnorm.h:31
double operator()() const
Definition: rlnorm.h:50
double norm_rand(void)
Definition: Rmath.h:30
LNormGenerator_1(double meanlog_=0.0)
Definition: rlnorm.h:47
double operator()() const
Definition: rlnorm.h:34
double operator()() const
Definition: rlnorm.h:64
Rcpp API.
Definition: algo.h:28