BUCHI NIRCal - Manual (Page 173)

Chemometrics
NIRCal 5.5 Manual, Version A 173
3.18.14 CV Property Residuum
Description CV Property Residuum is the difference between the original and CV
predicted property value.
Use It gives information of outlier sample.
Method PCR / PLS
Matrices ID 67
Tip It should be as close to zero as possible.
Details Big differences indicate outliers.
Related Topic CV Predicted Property
3.18.15 CV Regression Coefficients[1]
Description It shows as many regression coefficients, as many calculations / groups exist
in the CV calibration. Each regression coefficients name has the group
name, which was left out.
Use Help for the optimal secondary PCs selection.
Method PCR / PLS
Matrices ID 88
Tip In case each regression coefficients look similar, the calibration is stable. A
group with huge deviation indicates outlier.
Select PCs, which have stable regression coefficients (not noisy).
Details [1] means the 1st C-Set property. In general for each application only one C-
Set property is allowed, so for each property a separate calibration is
necessary (NIRCal could handle more, but NIRWare is concipated with only
one property per calibration for quantitative measurements).
NOTE
In the graphics the tooltip shows spectra and number e.g. "spectra (45)", the
number corresponds to the CV Group number (ignore the other information).
Related Topic Regression Coefficient , Regression Coefficients [1]
3.18.16 CV Regression Coefficients[1] Mean
Description Mean of CV Regression Coefficients [1] for each wavelength.
Use Used for the CV Regression Coefficients [1] t-test.
Method PCR / PLS
Matrices ID 90
Tip
Details
Related Topic CV Regression Coefficients[1] t-test
3.18.17 CV Regression Coefficients[1] Sdev
Description Standard Deviation of CV Regression Coefficients [1] for each wavelength.
Use Used for the CV Regression Coefficients[1] t-test.
Method PCR / PLS
Matrices ID 89
Tip
Details
Related Topic CV Regression Coefficients[1] t-test