NumCpp  1.0
A C++ implementation of the Python Numpy library
factorial.hpp
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1 #pragma once
30 
31 #include "NumCpp/NdArray.hpp"
32 #include "NumCpp/Core/Types.hpp"
34 
35 #include "boost/math/special_functions/factorials.hpp"
36 
37 #include <limits>
38 
39 namespace nc
40 {
41  namespace special
42  {
43  //============================================================================
44  // Method Description:
52  inline double factorial(uint32 inValue)
53  {
54  if (inValue <= boost::math::max_factorial<double>::value)
55  {
56  return boost::math::factorial<double>(inValue);
57  }
58  else
59  {
60  return std::numeric_limits<double>::infinity();
61  }
62  }
63 
64  //============================================================================
65  // Method Description:
73  inline NdArray<double> factorial(const NdArray<uint32>& inArray)
74  {
75  NdArray<double> returnArray(inArray.shape());
76 
77  stl_algorithms::transform(inArray.cbegin(), inArray.cend(), returnArray.begin(),
78  [](uint32 inValue) -> double
79  {
80  return factorial(inValue);
81  });
82 
83  return returnArray;
84  }
85  }
86 }
nc::NdArray::shape
Shape shape() const noexcept
Definition: NdArrayCore.hpp:4296
nc::NdArray< double >
nc::uint32
std::uint32_t uint32
Definition: Types.hpp:41
NdArray.hpp
nc::NdArray::cend
const_iterator cend() const noexcept
Definition: NdArrayCore.hpp:1491
nc
Definition: Coordinate.hpp:45
nc::special::factorial
double factorial(uint32 inValue)
Definition: factorial.hpp:52
nc::stl_algorithms::transform
OutputIt transform(InputIt first, InputIt last, OutputIt destination, UnaryOperation unaryFunction) noexcept
Definition: StlAlgorithms.hpp:703
nc::NdArray::cbegin
const_iterator cbegin() const noexcept
Definition: NdArrayCore.hpp:1147
StlAlgorithms.hpp
Types.hpp
nc::NdArray::begin
iterator begin() noexcept
Definition: NdArrayCore.hpp:1091