Table 2 The confusion matrix table of number sample for each group
| Â | Calibration | Validation | ||||
|---|---|---|---|---|---|---|
Actual classes | Actual classes | |||||
Normal | Mild | Severe | Normal | Mild | Severe | |
(a) Spectral data with no preprocess | ||||||
Predicted classes | ||||||
Normal | 7 | 1 | 0 | 3 | 0 | 0 |
Mild | 0 | 2 | 1 | 0 | 2 | 0 |
Severe | 0 | 4 | 6 | 0 | 1 | 3 |
(b) Spectral data with autoscale | ||||||
Predicted classes | ||||||
Normal | 7 | 0 | 0 | 3 | 0 | 0 |
Mild | 0 | 5 | 5 | 0 | 3 | 0 |
Severe | 0 | 2 | 2 | 0 | 0 | 3 |
(c). Spectral data with SNV | ||||||
Predicted classes | ||||||
Normal | 6 | 0 | 1 | 3 | 0 | 3 |
Mild | 0 | 4 | 4 | 0 | 3 | 0 |
Severe | 1 | 3 | 2 | 0 | 0 | 0 |
(d) Spectral data with mean center | ||||||
Predicted classes | ||||||
Normal | 7 | 0 | 0 | 3 | 0 | 0 |
Mild | 0 | 3 | 1 | 0 | 2 | 0 |
Severe | 0 | 4 | 6 | 0 | 1 | 3 |