hi, i'm having trouble working out how to fit repeated measures models
in asreml. i have a data file with one record per "animal", with 3
observations of the same trait, which looks something like this:
tag intake1 intake2 intake3 ... (other fields).
1 x1 y1 z1 ...
2 x2 NA z2 ...
(i have missing values for some animals)
i fit a model like this
intake1 intake2 intake3 ~ Trait Tr.line Tr.feedflock Tr.damage,
Tr.brtype Tr.sex !r sire units
1 2 0 !ASUV
1728 #no. of animals in the data
this seems to work ok: i get variance estimates which look sensible.
my next step is to add a second trait, which doesn't have repeated
observations. i can't for the life of me think how to specify this
model. what i would like to do is estimate "sire" and "residual"
covariance matrices for "intake" and my second trait, and a permanent
environment variance for "intake" (the "units" component from the above
analysis). can anyone help me here?
CSIRO Division of Animal Production
Pastoral Research Laboratory
Armidale 2350 AUSTRALIA
ph. +61 (0)2 67761377
fax +61 (0)2 67761333