lactation curve function

From: Nicola Macciotta <macciott_at_UNISS.IT>
Date: Tue, 14 Dec 2004 18:44:12 +0100

Dear ASREML users, I am studying the effect of the type of lactation curve
function used to model the individual deviations in Random Regression
Models on the estimated pattern of phenotypic variance. I have difficulties
in writing function (as for example the Wood or the Wilmink curve) that are
not implemented in the software. So, if for a Legendre polynomial of t
order I have to write

!r leg(days, t).animal

where animal is the column that identifies each individuals, what about for
(for example) the log linear form of the Wood model, where log(days) and
days are the term of the model? Thank you very much for your help


Nicol˛ P.P. Macciotta
Dipartimento di Scienze Zootecniche
UniversitÓ degli Studi di Sassari
Via De Nicola, 9
07100 Sassari, Italia
tel 39.079.229298 fax 39.079.229302
Received on Tue Dec 14 2004 - 18:44:12 EST

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