RMSECVRoot-Mean-Square Error of Cross-Validation
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The last but not least is the ratio of the RMSECV or RMSEP to SD of reference data in the prediction, denoted as RPD:
9394 Validation set Cross validation RMSECV ([double [R.
The best calibration model for particle size was that based on first derivative preprocessing (17-point smoothing) with three latent variables, which gave a reasonable combination of low RMSECV, high correlation coefficient, and low number of LVs.
5] Nonstandard abbreviations: CVD, cardiovascular disease; TG, triglyceride; NMR, nuclear magnetic resonance; PLS, partial least-squares; IDL, intermediate-density lipoprotein; and RMSECV, root mean square error of crossvalidation.
RMSECV, PC,(a) Relative mmol/L n r RMSECV, % Plasma Cholesterol 15.
The accuracy of prediction of the calibration set (using leave-one-out cross-validation) and the validation set was assessed using the following statistics: RMSECV for the calibration set, or the root mean squared error of prediction (RMSEP) for the validation set; bias; standard error of cross-validation (SECV) for the calibration set, or standard error of prediction (SEP) for the validation; RPD (Fearn 2002); concordance coefficient, which is an index between 0 and 1 that measures how close the regression line, between predicted and measured values, is to a 1 : 1 relationship (Lin 1989, 2000); Pearson's correlation coefficient ([R.