Re: [R] 2 LDA

From: Huntsinger, Reid <>
Date: Thu 16 Jun 2005 - 07:08:23 EST

Note that p1 and p2 depend only on d1 - d2. Have a look at a book like Ripley's "Pattern Recognition and Neural Networks" or Anderson's multivariate statistics book for further information.

Reid Huntsinger

-----Original Message-----
[] On Behalf Of Steve Adams Sent: Wednesday, June 15, 2005 4:54 PM
Subject: [R] 2 LDA


I am using Partek for LDA analysis. For a binary response variable, it generates 2 discriminant functions, one for each of the 2 levels of the response variable. And I can simply calculate 2 discriminant scores (say d1 and d2) for each sampples using the 2 discriminant functions, then I can use the following formula to compute the posterior probability for the sample:


In R, the lda function only generates 1 discriminant function, and exactly the same posterior probability as the LDA function in Partek does.

My question is what's the difference (or relationship) between the above 2 LDA functions, where I can find the reference for the partek LDA function?


Steve mailing list PLEASE do read the posting guide! mailing list PLEASE do read the posting guide! Received on Thu Jun 16 07:14:39 2005

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