Re: Consider reorganising the model

From: Arthur Gilmour <arthur.gilmour_at_CARGOVALE.COM.AU>
Date: Mon, 7 Dec 2009 17:15:22 +1100

Dear Tracy,
1) I was not able to read email last week, but it seems no-one has
answered your query.

2) I got cnfused and put the answer to some other query on the FORUM as
an answer to your query. Please ignore that response.

3) The error message is

** Notice **: Rscore: ASReml prefers I x US R structures for
MultiVariate data 6 2

appears misleading since you have 1 dimensional R structures.
It suggests a space problem.

So, what to do.

Its a large data set, are you using as much memory as possible.
What platform, how much memry?

Use -dl (!DEBUG !LOGFILE) and see if we can work ut from the .asl
file exactly where the job is failing.

6) General ideas (which I would do but which will probably not resolve
the problem:
a) Multipy response by 10 (or 100) so variance parameters are increased
by a factor of 100 (or 1000)
b) Fix initial values so initial matrices are positive definite.

7) Try using DIAG instead of US on the terms to see
a) if the job runs
b) get starting values for the extra variance.

8) I am happy to explore the job if you need further help.

On Wed, 2009-12-02 at 11:56 +0000, tpritchard wrote:
> I have successfully run a random regression model fitting legendre
> polynomials of order 1 for both random effects of sire and
> cow(permanent environmental effect). However, when I use the same
> model layout for legendre polynomial of order 2 for both random
> effects I have the message to consider reorganising the model.
> I have tried fitting sire as order 2 and the permanent environmental
> effect as order 1 but I get the same comment of considering
> reorganising the model.
> The starting values are taken from the previous analysis with random
> effects fitted with legendre polynomials of order 1, and I have tried
> different analyses changing parameters to be fixed, unbounded, and
> positive, but I keep getting the same error message.
> I wondered if anyone could suggest what I can do.

Best Wishes,
Arthur Gilmour
Adjunct Professor
School of Computing and Mathematics
Charles Sturt University
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Received on Tue Dec 07 2009 - 17:15:22 EST

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