Tag
3 articles tagged PLS.
RMSEC, RMSECV, and RMSEP are all reported in units of the property being predicted. They mean three different things, and confusing them is how process labs quietly overpromise model accuracy.
A calibration set defines what a chemometric model can predict, and where it will fail. Five planning decisions made up front determine whether validation later passes or unravels.
Spectra are not answers. The bridge between a 1,000-channel spectrum and a number you can act on is chemometrics - a small toolbox of multivariate methods, used the same way for forty years.