Table 6. Complexity metrics of 3D knee kinematics and reference databases.
Complexity measures | 3D knee kinematics | Wine | Iris |
---|---|---|---|
Fraction of points on the class boundary (N1) | 0.5 | 4.7 10−4 | 0.6 |
Ratio of average intra/inter class nearest neighbor distance (N2) | 0.9 | 0.026 | 0.1 |
Error rate of a nearest neighbor distance (N3) | 0.3 | 2.3 10−4 | 0 |
Non-linearity of 1-nearest neighbor classifier (N4) | 0.2 | 0.0 | 0 |
Fraction of maximum covering spheres (T1) | 1 | 1 | 1 |
Average number of points per dimension (T2) | 1.29 | 522 | 37.5 |