Stan Math Library  2.11.0
reverse mode automatic differentiation
tail.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_TAIL_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_TAIL_HPP
3 
10 #include <vector>
11 
12 namespace stan {
13 
14  namespace math {
15 
20  template <typename T>
21  inline
22  Eigen::Matrix<T, Eigen::Dynamic, 1>
23  tail(const Eigen::Matrix<T, Eigen::Dynamic, 1>& v,
24  size_t n) {
25  if (n != 0)
26  stan::math::check_row_index("tail", "n", v, n);
27  return v.tail(n);
28  }
29 
30 
35  template <typename T>
36  inline
37  Eigen::Matrix<T, 1, Eigen::Dynamic>
38  tail(const Eigen::Matrix<T, 1, Eigen::Dynamic>& rv,
39  size_t n) {
40  if (n != 0)
41  stan::math::check_column_index("tail", "n", rv, n);
42  return rv.tail(n);
43  }
44 
45  template <typename T>
46  std::vector<T> tail(const std::vector<T>& sv,
47  size_t n) {
48  typedef typename index_type<std::vector<T> >::type idx_t;
49  if (n != 0)
50  stan::math::check_std_vector_index("tail", "n", sv, n);
51  std::vector<T> s;
52  for (idx_t i = sv.size() - n; i < sv.size(); ++i)
53  s.push_back(sv[i]);
54  return s;
55  }
56 
57 
58  }
59 }
60 
61 #endif
Eigen::Matrix< T, Eigen::Dynamic, 1 > tail(const Eigen::Matrix< T, Eigen::Dynamic, 1 > &v, size_t n)
Return the specified number of elements as a vector from the back of the specified vector...
Definition: tail.hpp:23
bool check_row_index(const char *function, const char *name, const Eigen::Matrix< T_y, R, C > &y, size_t i)
Return true if the specified index is a valid row of the matrix.
Primary template class for the metaprogram to compute the index type of a container.
Definition: index_type.hpp:19
bool check_std_vector_index(const char *function, const char *name, const std::vector< T > &y, int i)
Return true if the specified index is valid in std vector.
bool check_column_index(const char *function, const char *name, const Eigen::Matrix< T_y, R, C > &y, const size_t i)
Return true if the specified index is a valid column of the matrix.

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