Table 1 Summary of quality-dependent features used for supervised learning
Number | Feature name | Short description |
|---|---|---|
1 | Area of IDT spikes | Area of spikes appearing in the indentation part |
2 | Curvature at CP | Curvature of the force-distance data at the contact point |
3 | Flatness of APR residuals | Fraction of the positive-gradient residuals in the approach part |
4 | Maxima in IDT residuals | Sum of the indentation residuals’ maxima in three intervals in-between 25% and 100% relative to the maximum indentation |
5 | Monotony of IDT | Change of the gradient in the indentation part |
6 | Overall IDT residuals | Sum of the residuals in the indentation part |
7 | Relative APR size | Length of the approach part relative to the indentation part |
8 | Residuals at CP | Mean value of the residuals around the contact point |
9 | Residuals in 75% IDT | Sum of the residuals in the indentation part in-between 25% and 100% relative to the maximum indentation |
10 | Residuals of APR | Absolute sum of the residuals in the approach part |
11 | Slope of BLN | Slope obtained from a linear least-squares fit to the baseline |
12 | Variation in BLN | Comparison of the forces at the beginning and at the end of the baseline |