NumCpp  2.12.1
A Templatized Header Only C++ Implementation of the Python NumPy Library
exponential.hpp
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1
28#pragma once
29
30#include <algorithm>
31#include <random>
32
34#include "NumCpp/Core/Shape.hpp"
35#include "NumCpp/NdArray.hpp"
37
38namespace nc::random
39{
40 namespace detail
41 {
42 //============================================================================
43 // Method Description:
53 template<typename dtype, typename GeneratorType = std::mt19937>
54 dtype exponential(GeneratorType& generator, dtype inScaleValue = 1)
55 {
57
58 std::exponential_distribution<dtype> dist(inScaleValue);
59 return dist(generator);
60 }
61
62 //============================================================================
63 // Method Description:
75 template<typename dtype, typename GeneratorType = std::mt19937>
76 NdArray<dtype> exponential(GeneratorType& generator, const Shape& inShape, dtype inScaleValue = 1)
77 {
79
80 NdArray<dtype> returnArray(inShape);
81
82 std::exponential_distribution<dtype> dist(inScaleValue);
83
84 std::for_each(returnArray.begin(),
85 returnArray.end(),
86 [&generator, &dist](dtype& value) -> void { value = dist(generator); });
87
88 return returnArray;
89 }
90 } // namespace detail
91
92 //============================================================================
93 // Method Description:
102 template<typename dtype>
103 dtype exponential(dtype inScaleValue = 1)
104 {
105 return detail::exponential(generator_, inScaleValue);
106 }
107
108 //============================================================================
109 // Method Description:
120 template<typename dtype>
121 NdArray<dtype> exponential(const Shape& inShape, dtype inScaleValue = 1)
122 {
123 return detail::exponential(generator_, inShape, inScaleValue);
124 }
125} // namespace nc::random
#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 exponential(GeneratorType &generator, dtype inScaleValue=1)
Definition: exponential.hpp:54
Definition: Random/bernoulli.hpp:41
dtype exponential(dtype inScaleValue=1)
Definition: exponential.hpp:103
static std::mt19937_64 generator_
generator function
Definition: generator.hpp:35
void for_each(InputIt first, InputIt last, UnaryFunction f)
Definition: StlAlgorithms.hpp:225