BUCHI NIRCal - Manual (Page 184)

NIRCal 5.5 Software Manual
184 NIRCal 5.5 Manual, Version A
The formula of spectra reconstruction:
where:

I n (k) : spectrum ( n: number of spectra, k: wavenumber);

<I (k)> : mean spectrum;

v in : scores (i: number of PC);

U i (k) : PCs / loadings;

R n : residuum spectrum.
A more detailed formula for the matrix is: Eigenvalue.
Minimum number of loading is one, the maximum number of PCs is never higher than the number of
C-Set spectra or C-Set Wavelengths.
See the PCs under the menubar: Graphics / Loadings.
3.18.45 Original Property
Description Original property values of all spectra in the project. (Dependent variable)
Use Defines the concentrations contained or classification of the spectra.
Method all
Matrices ID 1
Tip Editing is possible in NIRWare: Sample Management.
Details Table / Properties / Original
Related Topic Pretreated Property , Predicted Property
In cluster method each spectra is assigned to exactly one property by setting a 1 (one) to the class,
where it belongs, all other properties must have a value of 0 (zero).
In quantitative calibrations the original property values are equal to the results of the laboratory
methods referred to.