(no subject)

From: Nicola Macciotta <macciott_at_UNISS.IT>
Date: Thu, 6 Oct 2005 12:54:23 +0200

Dear ASREML users,
I am trying to run a random regression model for milk yield where I would
like to test for modeling individual random deviations wioh different
functions, some of them are not implemented in the ASREML software. For
example, the function proposed by Wilmink (1987, Liv. Prod. Sci.)

Ydim= a + be-kdim + cdim

where dim are the days in milk. The function can be linearised by setting k
to a fixed value (0.1 for example).

So the model I want to use has three terms

a the intercept

b that actually is (be-0.1dim )

c x dim

So my question is: how can I put this function as random within animal?
Could be this the correct syntax of the random part of the model?

r! a.animal b.animal dim.animal

and how can I get the (co)variance matrix of coefficients?

Thank you very much for your help

Nicol˛

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
e-mail macciott_at_uniss.it
Received on Wed Oct 06 2005 - 12:54:23 EST

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