1 #ifndef STAN_MATH_PRIM_MAT_FUN_QUAD_FORM_DIAG_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_QUAD_FORM_DIAG_HPP
5 #include <boost/math/tools/promotion.hpp>
15 using boost::math::tools::promote_args;
17 template <
typename T1,
typename T2,
int R,
int C>
19 <
typename promote_args<T1, T2>::type, Dynamic, Dynamic>
21 const Matrix<T2, R, C>& vec) {
24 int size = vec.size();
27 Matrix<typename promote_args<T1, T2>::type, Dynamic, Dynamic>
29 for (
int i = 0; i <
size; i++) {
30 result(i, i) = vec(i)*vec(i)*mat(i, i);
31 for (
int j = i+1; j <
size; ++j) {
32 typename promote_args<T1, T2>::type temp = vec(i)*vec(j);
33 result(j, i) = temp*mat(j, i);
34 result(i, j) = temp*mat(i, j);
bool check_vector(const char *function, const char *name, const Eigen::Matrix< T, R, C > &x)
Return true if the matrix is either a row vector or column vector.
Matrix< typename promote_args< T1, T2 >::type, Dynamic, Dynamic > quad_form_diag(const Matrix< T1, Dynamic, Dynamic > &mat, const Matrix< T2, R, C > &vec)
bool check_equal(const char *function, const char *name, const T_y &y, const T_eq &eq)
Return true if y is equal to eq.
int size(const std::vector< T > &x)
Return the size of the specified standard vector.
bool check_square(const char *function, const char *name, const Eigen::Matrix< T_y, Eigen::Dynamic, Eigen::Dynamic > &y)
Return true if the specified matrix is square.