NumCpp  2.12.1
A Templatized Header Only C++ Implementation of the Python NumPy Library
weibull.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 // Method Description:
55 template<typename dtype, typename GeneratorType = std::mt19937>
56 dtype weibull(GeneratorType& generator, dtype inA = 1, dtype inB = 1)
57 {
59
60 if (inA <= 0)
61 {
62 THROW_INVALID_ARGUMENT_ERROR("input a must be greater than zero.");
63 }
64
65 if (inB <= 0)
66 {
67 THROW_INVALID_ARGUMENT_ERROR("input b must be greater than zero.");
68 }
69
70 std::weibull_distribution<dtype> dist(inA, inB);
71 return dist(generator);
72 }
73
74 //============================================================================
75 // Method Description:
88 template<typename dtype, typename GeneratorType = std::mt19937>
89 NdArray<dtype> weibull(GeneratorType& generator, const Shape& inShape, dtype inA = 1, dtype inB = 1)
90 {
92
93 if (inA <= 0)
94 {
95 THROW_INVALID_ARGUMENT_ERROR("input a must be greater than zero.");
96 }
97
98 if (inB <= 0)
99 {
100 THROW_INVALID_ARGUMENT_ERROR("input b must be greater than zero.");
101 }
102
103 NdArray<dtype> returnArray(inShape);
104
105 std::weibull_distribution<dtype> dist(inA, inB);
106
107 std::for_each(returnArray.begin(),
108 returnArray.end(),
109 [&generator, &dist](dtype& value) -> void { value = dist(generator); });
110
111 return returnArray;
112 }
113 } // namespace detail
114
115 //============================================================================
116 // Method Description:
126 template<typename dtype>
127 dtype weibull(dtype inA = 1, dtype inB = 1)
128 {
129 return detail::weibull(generator_, inA, inB);
130 }
131
132 //============================================================================
133 // Method Description:
145 template<typename dtype>
146 NdArray<dtype> weibull(const Shape& inShape, dtype inA = 1, dtype inB = 1)
147 {
148 return detail::weibull(generator_, inShape, inA, inB);
149 }
150} // namespace nc::random
#define THROW_INVALID_ARGUMENT_ERROR(msg)
Definition: Error.hpp:37
#define STATIC_ASSERT_ARITHMETIC(dtype)
Definition: StaticAsserts.hpp:39
Holds 1D and 2D arrays, the main work horse of the NumCpp library.
Definition: NdArrayCore.hpp:139
iterator end() noexcept
Definition: NdArrayCore.hpp:1623
iterator begin() noexcept
Definition: NdArrayCore.hpp:1315
A Shape Class for NdArrays.
Definition: Core/Shape.hpp:41
dtype weibull(GeneratorType &generator, dtype inA=1, dtype inB=1)
Definition: weibull.hpp:56
Definition: Random/bernoulli.hpp:41
dtype weibull(dtype inA=1, dtype inB=1)
Definition: weibull.hpp:127
static std::mt19937_64 generator_
generator function
Definition: generator.hpp:35
void for_each(InputIt first, InputIt last, UnaryFunction f)
Definition: StlAlgorithms.hpp:225