[R] Binomial Reponses

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R.E. Darnell (R.E.Darnell@newcastle.ac.uk)
22 Oct 1999 13:24:37 +0100 




I understand that there are two ways to define the response  for 


binomial case in R(S). 


1) As a vector of p's for which the number of trials is assumed


   to be 1


2) As a 2 column matrix, the first being the number of sucesses, the 


second being the number of failures.



Before the weighted least squares function is used, the prior weights


need to be generated as well as the numer of success converted to a


proportion.



Two questions I have concern the 2nd case.



Does the model.response function convert the number of successes


 into a propn? I couldn't see that it did.



and  how is the denominator  included as a (prior) weight?



I would appreciate any help with these questions.



Thanks


Ross Darnell



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