Gets a column.

Get the value of the column at a given index from the matrix (whatever the ChainTypeFlag of the matrix).

Note

For column-matrices, it is equivalent to operator[], for row-matrices a traversal of the matrix is required (in \(\mathcal O(n)\)).

Warning

The matrix will perform boundary check.

Parameters

matrix	The matrix considered.
index	The coefficient index.

Returns

The column at given index.

Friends
template<typename _CT >
Sparse_chain< _CT, COLUMN >	CGAL::OSM::Sparse_matrix< CoefficientType, ChainTypeFlag >::get_column (const Sparse_matrix< _CT, COLUMN > &matrix, size_t index)
	Gets a column from a COLUMN matrix.
template<typename _CT >
Sparse_chain< _CT, COLUMN >	CGAL::OSM::Sparse_matrix< CoefficientType, ChainTypeFlag >::get_column (const Sparse_matrix< _CT, ROW > &matrix, size_t index)
	Gets a column from a ROW matrix.