zip_index() [1/2]

template<typename EigMat , typename IdxRows , typename IdxCols , require_eigen_matrix_dynamic_t< EigMat > * = nullptr, require_all_vector_t< IdxRows, IdxCols > * = nullptr>

auto stan::math::zip_index ( EigMat &&  x, IdxRows &&  idx_row, IdxCols &&  idx_col  )

inline

Return the column vector of elements of x selected by paired (zipped) 1-based row and column indices.

Template Parameters

EigMat

type of the matrix

Parameters

x	input matrix
idx_row	row index vector
idx_col	column index vector

Returns

column vector with element i equal to x(idx_row[i]-1, idx_col[i]-1)

Exceptions

std::invalid_argument	if the index vectors are of different lengths
std::out_of_range	if any index is out of the valid range of the matrix

Definition at line 27 of file zip_index.hpp.