Table 9.
LDA classifications after e-tongue data drift correction, outlier detection and three-fold cross—validation when the adulterant type was used as class variable.
| Accuracy | Authentic | Paprika Seed | Corn Starch | Sucrose | Salt | Average Classification | |
|---|---|---|---|---|---|---|---|
| Recognition | Authentic | 98.04 | 19.11 | 35.29 | 67.18 | 8.83 | 60.73% |
| Paprika seed | 0 | 61.78 | 0 | 0 | 0 | ||
| Corn starch | 1.96 | 14.7 | 61.76 | 12.52 | 5.87 | ||
| Sucrose | 0 | 4.41 | 2.96 | 20.3 | 23.52 | ||
| Salt | 0 | 0 | 0 | 0 | 61.78 | ||
| Validation | Authentic | 97.66 | 17.64 | 41.18 | 78.07 | 5.91 | 52.56% |
| Paprika seed | 0 | 58.82 | 8.82 | 0 | 2.91 | ||
| Corn starch | 2.34 | 17.64 | 41.18 | 15.65 | 11.74 | ||
| Sucrose | 0 | 5.91 | 8.82 | 6.28 | 20.56 | ||
| Salt | 0 | 0 | 0 | 0 | 58.87 |