| Frequency | c | d | R2 |
| 0.0156 Hz | 6.19 × 106 | 1.20 | 0.577 |
| 0.0625 Hz | 3.70 × 106 | 1.28 | 0.819 |
| 0.25 Hz | 7.97 × 105 | 1.43 | 0.870 |
| 1 Hz | 1.02 × 105 | 1.49 | 0.872 |