# When to use linear discriminant function and when logistic regression? [duplicate]

I am trying to find out when for creating classification rule to use linear discriminant function and when to use logistic regression? I need to help to find information sources to this topic. Any clue?

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• My advice would be first to try search logistic discriminant on this site. There is a dozen relevant questions already posted. – ttnphns Jan 2 '15 at 12:26
• ... with stats.stackexchange.com/questions/14697/… having the most complete answers. Note there that since logistic regression is derivable from LDA by Bayes' rule, if the assumption-laden LDA fits the data, the logistic necessarily does also. So there is little reason to use LDA. – Frank Harrell Jan 2 '15 at 13:48
• See http:biostat.mc.vanderbilt.edu/wiki/pub/Main/FrankHarrell/discrim.pdf for my paper explaining why Efron's result is misleading. – Frank Harrell Jan 4 '15 at 3:41