Iterator pointing at the begin of the dataset. * * @return Iterator for the dataset. */
| 116 | * @return Iterator for the dataset. |
| 117 | */ |
| 118 | iterator begin() const |
| 119 | { |
| 120 | return iterator(_dataset1.begin(), _dataset2.begin()); |
| 121 | } |
| 122 | |
| 123 | /** Size of the dataset. |
| 124 | * |