BUCHI NIRCal - Manual (Page 204)

NIRCal 5.5 Software Manual
204 NIRCal 5.5 Manual, Version A
3.18.90 V-Set Regression Coefficient
Description Validation Set Regression Coefficient of Original Property and Predicted
Property (also known as correlation coefficient or Pearson's correlation
coefficient)
Use To compare with the C-Set regression Coefficient
Method PCR / PLS
Matrices ID 27
Tip Should be as close to 1 as possible.
Details Visible on the calibration curve and in the calibration protocol.
Formula
Related Topic C-Set Regression Coefficient , Original Property , Predicted Property
The regression coefficient "r" shows, how well the predicted values match with the reference values
(original property values) on average.
The correlation is rated as acceptable when r > 0.9 is achieved (the error of the conventional reference
method goes into the NIR-calibration via the reference values).
The regression curve can be described better with the slope (a) and intercept (b): f(x)= ax + b