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upd
2010 Oct 15
2
How to extract parameter estimates of variance function from lme fit
Dear R-Users,
I have a question concerning extraction of parameter estimates of
variance function from lme fit.
To fit my simulated data, we use varConstPower ( constant plus power
variance function).
fm<-lme(UPDRS~time,data=data.simula,random=~time,method="ML",weights=varConstPower(fixed=list(power=1)))
I extract the results of this function by using the following codes:
y<-summary(fm)
x<-y$modelStruct$varStruct
> x
Variance function structure of class varConstPower representing...