BUCHI NIRCal - Manual (Page 123)

Chemometrics
NIRCal 5.5 Manual, Version A 123
There are spectral characteristics, which are still not fitted, the residuum spectra are bigger, as
the noise of the instrument.
NOTE
Avoid underfitting and overfitting! The PCs / Factor Selection Wizard can help with an estimate.
3.7 Adjusting Primary PCs (Calculation Parameters)
Menu: Calibration \ Parameter \ Calculation
Icon:
The primary PCs are edited in the Dialog called Calculation Parameters. To check the result of the
Setting of the Primary Principal components open the graphic Spectra Residuum: Menu: Graphics /
Spectra /
Residuum :
NOTE
Avoid overfitting: do not use too many principal components with little information.