Pc data set – BUCHI NIRCal User Manual
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Chemometrics
NIRCal 5.5 Manual, Version A
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3.3.8 PC Data Set
Principal Components or Loadings (old name Factors) are artificial difference spectra.
All PCs: Number of selected primary PCs.
User PCs: use this set as a selection buffer (e.g. for visibility).
Calibration PCs: these secondary PCs are used to create the calibration model. Calibration PCs or
secondary PCs form a subset of the primary PCs of the calibration.