Table 8. PLS results for set 3.
| # PCs | % cumulated variance | RMSEV | Q (2) | RMSEC | R2 | |
|---|---|---|---|---|---|---|
| Women | ||||||
| Natural | 1 | 99.31 | 6 | 0.07 | 5.65 | 0.07 |
| Smiling | 1 | 99.22 | 6 | 0.09 | 5.75 | 0.09 |
| Men | ||||||
| Natural | 2 | 99.87 | 6 | 0.75 | 5.85 | 0.76 |
| Smiling | 2 | 99.82 | 8 | 0.60 | 7.44 | 0.62 |
#PCs = Principal Component; % cumulated variance = amount of information according to the number of optimal principal components; RMSEV = Root Mean Square Error of Validation; Q2 = internal correlation coefficient model cross validation; RMSEC = Root Mean Square Error of Calibration; R2 = correlation coefficient for calibration.