You may leave the list at any time by sending the commandHi Allstatters,
Thank you for the responses to my query (8 in all). The point that I took out was that DA relies on the assumption of Multivariate Normality of the predictor variables whilst MLR doesn’t make this assumption. I sensed a mild preference for MLR from respondents with one correspondent noting that MLR was developed after the publication by Mardia, Kent, Bibby on multivariate analysis. Two referred me to this link http://www-stat.stanford.edu/~tibs/ElemStatLearn/ for more details. A few were surprised that I didn’t have DA in my version of R though I should have said I am using RExcel so it may not appear in the RExcel menus but is probably still in my R package.
However, nobody answered my point (which wasn’t well phrased) as to why Wikipedia fails to make mutual references to these 2 techniques. If you read these wiki pages http://en.wikipedia.org/wiki/Linear_discriminant_analysis for DA and http://en.wikipedia.org/wiki/Multinomial_logit for MLR, you will note both make copious references to related methods but neither refer to each other which I found odd given the similarity of purpose. That led me to wonder if I had misunderstood the purpose of these 2 techniques.
Regards
Nigel Marriott
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Basilio de Bragança Pereira ,DIC and PhD(Imperial College), DL(COPPE)
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