NumCpp  2.3.0
A Templatized Header Only C++ Implementation of the Python NumPy Library
factorial.hpp
Go to the documentation of this file.
1 #pragma once
29 
31 #include "NumCpp/Core/Types.hpp"
32 #include "NumCpp/NdArray.hpp"
33 
34 #include "boost/math/special_functions/factorials.hpp"
35 
36 #include <limits>
37 
38 namespace nc
39 {
40  namespace special
41  {
42  //============================================================================
43  // Method Description:
51  inline double factorial(uint32 inValue)
52  {
53  if (inValue <= boost::math::max_factorial<double>::value)
54  {
55  return boost::math::factorial<double>(inValue);
56  }
57 
58  return std::numeric_limits<double>::infinity();
59  }
60 
61  //============================================================================
62  // Method Description:
70  inline NdArray<double> factorial(const NdArray<uint32>& inArray)
71  {
72  NdArray<double> returnArray(inArray.shape());
73 
74  stl_algorithms::transform(inArray.cbegin(), inArray.cend(), returnArray.begin(),
75  [](uint32 inValue) -> double
76  {
77  return factorial(inValue);
78  });
79 
80  return returnArray;
81  }
82  } // namespace special
83 } // namespace nc
nc::NdArray::shape
Shape shape() const noexcept
Definition: NdArrayCore.hpp:4311
nc::NdArray< double >
nc::stl_algorithms::transform
OutputIt transform(InputIt first, InputIt last, OutputIt destination, UnaryOperation unaryFunction)
Definition: StlAlgorithms.hpp:702
nc::uint32
std::uint32_t uint32
Definition: Types.hpp:40
NdArray.hpp
nc::NdArray::cend
const_iterator cend() const noexcept
Definition: NdArrayCore.hpp:1490
nc
Definition: Coordinate.hpp:44
nc::special::factorial
double factorial(uint32 inValue)
Definition: factorial.hpp:51
nc::NdArray::cbegin
const_iterator cbegin() const noexcept
Definition: NdArrayCore.hpp:1146
StlAlgorithms.hpp
Types.hpp
nc::NdArray::begin
iterator begin() noexcept
Definition: NdArrayCore.hpp:1090