Cross‐validation, influential observations and selection of variables in chemometric studies of wines by principal components analysis
- 1 May 1990
- journal article
- Published by Wiley in Journal of Chemometrics
- Vol. 4 (3) , 217-240
- https://doi.org/10.1002/cem.1180040304
Abstract
Cross‐validatory estimation of the bilinear model based on principal components is reviewed and Krzanowski's modification of Wold's procedure is described. Two different types of residuals useful for checking model adequacy are defined and indices measuring the influence of each observed unit on the estimates of the parameters are discussed. A method for the selection of variables derived from Procrustes analysis is described. Results arising from the study of two sets of enological data are given.Keywords
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