Re: [NMusers] estimating Ka from dataset combining rich sample study and sparse sampling study

2009-06-18 Thread Ethan Wu
Dear all,    thanks to Mats suggestion, using full cov matrix did assign Eta more reasonably to Ka, with not very precised estimates   another suggestion is that, there may be some underline difference in the structure model between sparse MD data, and rich SD -- by visual inspection of sparse

RE: [NMusers] estimating Ka from dataset combining rich sample study and sparse sampling study

2009-06-18 Thread James G Wright
Dear all, I agree that this kind of behaviour suggests there is some problem with the model (most likely a lack of exchangeability). I think the ideas suggested are all good, but the first thing I would try is to separate residual noise for the two studies with an indicator variable. It is like

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2009-06-18 Thread Marieke de Kam
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