Re: GIV matrix

Dear Vivi,

There are no obvious syntactical problems with your code
except it should have an itial value for the genetic variance, but
it looks like you are fitting a HUGE model.

BLUE !WT wt ~ mu !r gen yea.occ.gen

1 1 1
0 0 0 !s2== 0.4430 # No point using so many decimal places; 36672875

gen 1
gen 0 GIV 0.1

Should be exactly equivalent to

BLUE !WT wt ~ mu !r giv(gen,1) yea.occ.gen

1 1 1
0 0 0 !s2== 0.4430 # No point using so many decimal places; 36672875

I say HUGE because yea.occ.gen has 25 x 208 x 686 = 3567200 levels
so presumably you have more than that records of data, depending on the
structure.

Furthur, if you want a GIV structure on the main effects, you presumably
want it on the interaction as well.
This does require seting up a G structure line [yea.occ.giv(gen,1) does
not actually apply GIV1 ton the gen dimension]
Use
yea.occ.gen 2
5200 0 I
gen 0 GIV1 .1 !GP

If there are many empty cells in yea.occ, then recoding the interaction
as a single factor
will reduce the dimensionality and maybe allow the model to run.

I trust this helps

May you know Jesus Christ and His blessing in 2007,

Arthur Gilmour, His servant .

Mixed model regression mapping for QTL detection in experimental crosses.
Computational Statistics and Data Analysis 51:3749-3764 now available at
http://dx.doi.org/10.1016/j.csda.2006.12.031

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Received on Mon Jun 07 2007 - 15:57:23 EST