Table 7 Varying levels of class imbalance with ROS and RUS
Method | \(n_{neg}\) | \(n_{pos}\) | \(N_{train}\) | \(n_{neg}{:}n_{pos}\) |
|---|---|---|---|---|
– | 3,377,421 | 1085 | 3,378,506 | 99.97:0.03 |
RUS-1 | 107,402 | 1085 | 108,487 | 99:1 |
RUS-2 | 4390 | 1085 | 5475 | 80:20 |
RUS-3 | 1620 | 1085 | 2705 | 60:40 |
RUS-4 | 1085 | 1085 | 2170 | 50:50 |
RUS-5 | 710 | 1085 | 1795 | 40:60 |
ROS-1 | 3,377,421 | 33,635 | 3,411,046 | 99:1 |
ROS-2 | 3,377,421 | 844,130 | 4,221,551 | 80:20 |
ROS-3 | 3,377,421 | 2,251,375 | 5,628,796 | 60:40 |
ROS-4 | 3,377,421 | 3,377,421 | 6,754,842 | 50:50 |
ROS-5 | 3,377,421 | 5,064,780 | 8,442,201 | 40:60 |
ROS–RUS-1 | 1,688,710 | 1,688,710 | 3,377,420 | 50:50 |
ROS–RUS-2 | 844,355 | 844,355 | 1,688,710 | 50:50 |
ROS–RUS-3 | 337,742 | 337,742 | 675,484 | 50:50 |