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*To*: I.Phillips@mailbox.uq.edu.au*Subject*: Re: 2 more ASREML questions*From*: gilmoua@ornsun.agric.nsw.gov.au (Arthur Gilmour)*Date*: Thu, 6 Nov 1997 08:49:58 +1100*Cc*: asreml@chiswick.anprod.CSIRO.AU*Sender*: owner-asreml

> Arthur, > > I am trying to run a large job and I wanted to fit a five-way interaction > with all smaller interactions but the output in the .asr file didn't > contain F-statistics for the any of the interaction terms or main effects. > Is this due to the size of the problem and I have to calculate them > myself? The problem is probably one of order of terms and that you have not expicitly fitted constraints. There will not be a problem if mu is first and all terms are in the dense portion and terms are in standard order e.g. mu A B A.B A.C B.C A.B.C etc In this case ASREML reverses the order for fitting and generates appropriate marginal sums of squares viz A.B.C.D.E | lower order etc However, if mu is omitted or not first or if A.B.C.D.E is in the sparce section, then A.B.C.D.E is fitted before all other terms and there is no variation left for the other terms. The solution if you want to fit the model thast way is to constrain the terms viz c(A).c(B).c(C).c(D).c(E) which you might just be able to do. > > Secondly, is there a simple way of fitting a five-way interaction term > like a*b*c*d*e that will fit all lower order interactions or do I have to > explicitly have to fit all the interactions? > No. You have to give the full list: making sure that interaction names do not exceed 20 characters [i.e. you will probably have to use shortened names. > > Ian Phillips > > > <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> Arthur Gilmour PhD email: gilmoua@agric.nsw.gov.au Senior Research Scientist (Biometrics) fax: <61> 2 6391 3899 NSW Agriculture telephone work: <61> 2 6391 3815 Orange Agricultural Institute home: <61> 2 6362 0046 Forest Rd, ORANGE, 2800, AUSTRALIA ASREML is currently free by anonymous ftp from pub/aar on ftp.res.bbsrc.ac.uk Point your web browser at ftp://ftp.res.bbsrc.ac.uk/pub/aar/ **NOTE CHANGE** in the IACR-Rothamsted information system http://www.res.bbsrc.ac.uk/ To join the asreml discussion list, send the message subscribe to asreml-request@chiswick.anprod.CSIRO.au The address for messages to the list is asreml@chiswick.anprod.CSIRO.au Where is He who has been born King of the Jews? For we have seen His star in the East and have come to worship Him. Matthew 2:2 <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

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