BUCHI NIRCal - Manual (Page 44)

NIRCal 5.5 Software Manual
44 NIRCal 5.5 Manual, Version A
For 100 spectra with1501 data points the following data reduction is obtained with 15 PCs:
100 x 1.501 ==> 1.501 + [15x1.501] + [100x 15] + 100
150.100 ==> 1.501 + [22.515] + [1.500] + 100
Example for a Principal Component Analysis:
4 different acetone qualities: without and with 0.3 %; 0.7 % and 1.0 % added water. There are only 3
PCs necessary to reconstruct the spectra. The scores according to PC 1 and PC 2 are repeatable.
The residuum spectra have only noise character.
As a result of the PCA, we obtain those PCs which themselves represent spectra and scores for each
spectrum.