|  |  | Cross-validation assignment rate (%) | |
---|---|---|---|---|
Data acquisition | Data processing | # of PC axes | Observed | 95% confidence interval (derived from bootstrap) |
Curve tracing | Bending energy | 9 | 87.0 | 69.6 – 95.7 |
Fan | Bending energy | 7 | 89.1 | 76.1 – 95.7 |
Curve tracing | Perpendicular projection | 13 | 84.8 | 76.1 – 97.8 |
Fan | Perpendicular projection | 7 | 89.1 | 78.3 – 97.8 |
Curve tracing | Elliptical Fourier analysis | 12 | 73.9 | 63.0 – 93.5 |
Curve tracing | Eigenshape analysis | 24 | 69.6 | 67.4 – 95.7 |