NumCpp  2.9.0
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
42 {
43  namespace random
44  {
45  namespace detail
46  {
47  //============================================================================
48  // Method Description:
60  template<typename dtype, typename GeneratorType = std::mt19937>
61  dtype laplace(GeneratorType& generator, dtype inLoc = 0, dtype inScale = 1)
62  {
64 
65  boost::random::laplace_distribution<dtype> dist(inLoc, inScale);
66  return dist(generator);
67  }
68 
69  //============================================================================
70  // Method Description:
84  template<typename dtype, typename GeneratorType = std::mt19937>
85  NdArray<dtype> laplace(GeneratorType& generator, const Shape& inShape, dtype inLoc = 0, dtype inScale = 1)
86  {
88 
89  NdArray<dtype> returnArray(inShape);
90 
91  boost::random::laplace_distribution<dtype> dist(inLoc, inScale);
92 
93  std::for_each(returnArray.begin(),
94  returnArray.end(),
95  [&generator, &dist](dtype& value) -> void { value = dist(generator); });
96 
97  return returnArray;
98  }
99  } // namespace detail
100 
101  //============================================================================
102  // Method Description:
113  template<typename dtype>
114  dtype laplace(dtype inLoc = 0, dtype inScale = 1)
115  {
116  return detail::laplace(generator_, inLoc, inScale);
117  }
118 
119  //============================================================================
120  // Method Description:
133  template<typename dtype>
134  NdArray<dtype> laplace(const Shape& inShape, dtype inLoc = 0, dtype inScale = 1)
135  {
136  return detail::laplace(generator_, inShape, inLoc, inScale);
137  }
138  } // namespace random
139 } // namespace nc
140 
141 #endif // #ifndef NUMCPP_NO_USE_BOOST
#define STATIC_ASSERT_ARITHMETIC(dtype)
Definition: StaticAsserts.hpp:37
Holds 1D and 2D arrays, the main work horse of the NumCpp library.
Definition: NdArrayCore.hpp:72
iterator end() noexcept
Definition: NdArrayCore.hpp:1479
iterator begin() noexcept
Definition: NdArrayCore.hpp:1171
A Shape Class for NdArrays.
Definition: Core/Shape.hpp:41
dtype laplace(GeneratorType &generator, dtype inLoc=0, dtype inScale=1)
Definition: Random/laplace.hpp:61
dtype laplace(dtype inLoc=0, dtype inScale=1)
Definition: Random/laplace.hpp:114
static std::mt19937_64 generator_
generator function
Definition: generator.hpp:37
void for_each(InputIt first, InputIt last, UnaryFunction f)
Definition: StlAlgorithms.hpp:227
Definition: Coordinate.hpp:45