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...It seems to me that a robust criterion is the value of the discriminatory power (i.e. the ratio of the separation of the class means to within-class variance) How can I obtain this ratio from V & R's qda() output ? Thanks (I hope this question is relevant) -- Daniel AMORESE Lab. M2C "Morphodynamique Continentale et C?ti?re" UMR CNRS 6143 Caen/Rouen Centre de G?omorphologie UCBN (Universit? de Caen Basse-Normandie) 14032 Caen Cedex FRANCE Ph: +33 (0)2 31 56 57 19 Fax: +33 (0)2 31 56 57 57 Courriel: amorese at geos.unicaen.fr http://www.geos.unicaen.fr/perso/da/daperso.html -.-.-.-.-.-.-.-....

Hello, Does logistic regression really provide better results than lda or qda ? (my purpose is not classification but highlighting of discriminant variables). If this is true, where could I get an R script performing stepwise logistic regression ? Thanks -- Daniel AMORESE Lab. M2C "Morphodynamique Continentale et C?ti?re" UMR CNRS 6143 Caen/Rouen Centre de G?omorphologie UCBN (Universit? de Caen Basse-Normandie) 14032 Caen Cedex FRANCE Ph: +33 (0)2 31 56 57 19 Fax: +33 (0)2 31 56 57 57 Courriel: amorese at geos.unicaen.fr http://www.geos.unicaen.fr/perso/da/daperso.html -.-.-.-.-.-.-.-....