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Description of the UCI data sets
| Data sets | Sample sizes | Numbers of attributes | Majority class (y i = 1) | Minority class (y i = 0) | Imbalance levels (ratio*) |
|---|---|---|---|---|---|
| Ecoli (im) | 336 | 7 | Class ≠ im | Class = im | 3.36:1 |
| Ecoli (imU) | 336 | 7 | Class ≠ imU | Class = imU | 8.6:1 |
| Abalone (9 vs. 18) | 731 | 8 | Class ≠ 9 | Class = 18 | 16.40:1 |
| Yeast (ME2) | 1484 | 8 | Class ≠ ME2 | Class = ME2 | 28.1:1 |
* This ratio represents the ratio of majority instances to minority instances
