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Direct Orthogonalization: some case studies

  • Fernández Pierna, J.A. , Massart, D. , De Noord, O. & Ricoux, P. (2001). Direct Orthogonalization: some case studies. Chemom. Intell. Lab. Syst. 55: (1-2), 101-108.
Type Journal Article
Year 2001
Title Direct Orthogonalization: some case studies
Journal Chemom. Intell. Lab. Syst.
Label U15-0524-fernandez-2001
Recnumber 347
Volume 55
Issue 1-2
Pages 101-108
Date 13/01/2001
Endnote Keywords pre-processing methods, direct orthogonalization, multivariate calibration|near-infrared spectra|multivariate calibration|signal correction|models|
Abstract The effects of a Direct Orthogonalization before applying PCR acid PLS are studied for several data sets. In all cases the number of PLS factors needed to obtain the optimal model decreases but the number of PLS and DO factors together is the same as when PLS alone is used, However, the quality of the calibration model (measured as RMSECV) is usually not better when using DO, nor does the predictive quality (RMSEP) change significantly in most cases. The method may be used, however, to obtain a better understanding of the variation present in the data. (C) 2001 Elsevier Science B.V. All rights reserved.
Author address Fernandez Pierna Juan Antonio, Quality Department of Agro-food Products, Walloon Agricultural Research Centre (CRA-W), Chaussée de Namur, 24, B-5030 Gembloux, fernandez@cra.wallonie.be
Fichier U15-0524-fernandez-2001.pdf
Authors Fernández Pierna, J.A. , Massart, D. , De Noord, O. & Ricoux, P.