NumCpp  2.12.1
A Templatized Header Only C++ Implementation of the Python NumPy Library
Random/bernoulli.hpp
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1
28#pragma once
29
30#include <algorithm>
31#include <random>
32#include <string>
33
36#include "NumCpp/Core/Shape.hpp"
37#include "NumCpp/NdArray.hpp"
39
40namespace nc::random
41{
42 namespace detail
43 {
44 //============================================================================
45 // Method Description:
52 template<typename GeneratorType = std::mt19937>
53 bool bernoulli(GeneratorType& generator, double inP = 0.5)
54 {
55 if (inP < 0 || inP > 1)
56 {
57 THROW_INVALID_ARGUMENT_ERROR("input probability of success must be of the range [0, 1].");
58 }
59
60 std::bernoulli_distribution dist(inP);
61 return dist(generator);
62 }
63
64 //============================================================================
65 // Method Description:
74 template<typename GeneratorType = std::mt19937>
75 NdArray<bool> bernoulli(GeneratorType& generator, const Shape& inShape, double inP = 0.5)
76 {
77 if (inP < 0 || inP > 1)
78 {
79 THROW_INVALID_ARGUMENT_ERROR("input probability of success must be of the range [0, 1].");
80 }
81
82 NdArray<bool> returnArray(inShape);
83
84 std::bernoulli_distribution dist(inP);
85
86 std::for_each(returnArray.begin(),
87 returnArray.end(),
88 [&generator, &dist](bool& value) -> void { value = dist(generator); });
89
90 return returnArray;
91 }
92 } // namespace detail
93
94 //============================================================================
95 // Method Description:
101 inline bool bernoulli(double inP = 0.5)
102 {
103 return detail::bernoulli(generator_, inP);
104 }
105
106 //============================================================================
107 // Method Description:
115 inline NdArray<bool> bernoulli(const Shape& inShape, double inP = 0.5)
116 {
117 return detail::bernoulli(generator_, inShape, inP);
118 }
119} // namespace nc::random
#define THROW_INVALID_ARGUMENT_ERROR(msg)
Definition: Error.hpp:37
iterator end() noexcept
Definition: NdArrayCore.hpp:1623
iterator begin() noexcept
Definition: NdArrayCore.hpp:1315
A Shape Class for NdArrays.
Definition: Core/Shape.hpp:41
bool bernoulli(GeneratorType &generator, double inP=0.5)
Definition: Random/bernoulli.hpp:53
Definition: Random/bernoulli.hpp:41
bool bernoulli(double inP=0.5)
Definition: Random/bernoulli.hpp:101
static std::mt19937_64 generator_
generator function
Definition: generator.hpp:35
void for_each(InputIt first, InputIt last, UnaryFunction f)
Definition: StlAlgorithms.hpp:225