Instruction Manual

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