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probed
2006 Jun 19
2
Nested variance-covariance matrix in Multilevel model
...model has two fixed effects called End and logpgc, the response
variable is the logarithm to base 2 of Intensity ( log2(Intensity) )
and the random effects are called Probe and ProbeNo.
The model has the following nesting structure: A Pixel is nested within
the ProbeNo,the ProbeNo is within the ProbeEnd ( there are two ends for
every probe), and the ProbeEnd is within the Probe.
Now the problem I have is that the variance-covariance structure of the
model is quite complex and I can not find the right syntax for fitting
it in the lme function.
The variance-covariance structure is a block diag...