at at Column Column Column Column columns_row_count Dim entry entry field field Info info make_column make_column operator() operator() rename reshape reshape row_count rowCount slice slice Value

operator()() const T & operator() ( long  row, long  repeat = 0  ) const Access the value at given row and repeat indices. Parameters row The row index repeat The repeat index Several methods are available to access elements: data() returns a pointer to the first element; operator()() gives access to the element at given row and repeat indices; at() additionally perform bound checking and allows for backward (negative) indexing.