Stan Math Library  2.15.0
reverse mode automatic differentiation
check_lower_triangular.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_ERR_CHECK_LOWER_TRIANGULAR_HPP
2 #define STAN_MATH_PRIM_MAT_ERR_CHECK_LOWER_TRIANGULAR_HPP
3 
7 #include <sstream>
8 #include <string>
9 
10 namespace stan {
11  namespace math {
30  template <typename T_y>
31  inline void
32  check_lower_triangular(const char* function,
33  const char* name,
34  const Eigen::Matrix<T_y, Eigen::Dynamic, Eigen::Dynamic>& y) {
35  for (int n = 1; n < y.cols(); ++n) {
36  for (int m = 0; m < n && m < y.rows(); ++m) {
37  if (y(m, n) != 0) {
38  std::stringstream msg;
39  msg << "is not lower triangular;"
40  << " " << name << "[" << stan::error_index::value + m << ","
41  << stan::error_index::value + n << "]=";
42  std::string msg_str(msg.str());
43  domain_error(function, name, y(m, n),
44  msg_str.c_str());
45  }
46  }
47  }
48  }
49 
50  }
51 }
52 #endif
void check_lower_triangular(const char *function, const char *name, const Eigen::Matrix< T_y, Eigen::Dynamic, Eigen::Dynamic > &y)
Check if the specified matrix is lower triangular.
void domain_error(const char *function, const char *name, const T &y, const char *msg1, const char *msg2)
Throw a domain error with a consistently formatted message.

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