NumCpp  2.11.0
A Templatized Header Only C++ Implementation of the Python NumPy Library
Random/laplace.hpp
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1 #pragma once
29 
30 #ifndef NUMCPP_NO_USE_BOOST
31 
32 #include <algorithm>
33 
34 #include "boost/random/laplace_distribution.hpp"
35 
37 #include "NumCpp/Core/Shape.hpp"
38 #include "NumCpp/NdArray.hpp"
40 
41 namespace nc::random
42 {
43  namespace detail
44  {
45  //============================================================================
46  // Method Description:
58  template<typename dtype, typename GeneratorType = std::mt19937>
59  dtype laplace(GeneratorType& generator, dtype inLoc = 0, dtype inScale = 1)
60  {
62 
63  boost::random::laplace_distribution<dtype> dist(inLoc, inScale);
64  return dist(generator);
65  }
66 
67  //============================================================================
68  // Method Description:
82  template<typename dtype, typename GeneratorType = std::mt19937>
83  NdArray<dtype> laplace(GeneratorType& generator, const Shape& inShape, dtype inLoc = 0, dtype inScale = 1)
84  {
86 
87  NdArray<dtype> returnArray(inShape);
88 
89  boost::random::laplace_distribution<dtype> dist(inLoc, inScale);
90 
91  std::for_each(returnArray.begin(),
92  returnArray.end(),
93  [&generator, &dist](dtype& value) -> void { value = dist(generator); });
94 
95  return returnArray;
96  }
97  } // namespace detail
98 
99  //============================================================================
100  // Method Description:
111  template<typename dtype>
112  dtype laplace(dtype inLoc = 0, dtype inScale = 1)
113  {
114  return detail::laplace(generator_, inLoc, inScale);
115  }
116 
117  //============================================================================
118  // Method Description:
131  template<typename dtype>
132  NdArray<dtype> laplace(const Shape& inShape, dtype inLoc = 0, dtype inScale = 1)
133  {
134  return detail::laplace(generator_, inShape, inLoc, inScale);
135  }
136 } // namespace nc::random
137 
138 #endif // #ifndef NUMCPP_NO_USE_BOOST
#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:138
iterator end() noexcept
Definition: NdArrayCore.hpp:1576
iterator begin() noexcept
Definition: NdArrayCore.hpp:1268
A Shape Class for NdArrays.
Definition: Core/Shape.hpp:41
dtype laplace(GeneratorType &generator, dtype inLoc=0, dtype inScale=1)
Definition: Random/laplace.hpp:59
Definition: Random/bernoulli.hpp:41
dtype laplace(dtype inLoc=0, dtype inScale=1)
Definition: Random/laplace.hpp:112
static std::mt19937_64 generator_
generator function
Definition: generator.hpp:35
void for_each(InputIt first, InputIt last, UnaryFunction f)
Definition: StlAlgorithms.hpp:225