[R] Obtaining Estimates of the Random Effects Parameters

[Doran, Harold]

?VarCorr 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Rick Bilonick
> Sent: Wednesday, December 13, 2006 11:40 AM
> To: R Help
> Subject: [R] Obtaining Estimates of the Random Effects Parameters
> 
> I'm running simulation using lme and sometimes the estimated 
> variance-covariance matrix is not positive definite so that 
> the intervals function won't work for the random effect 
> coefficients. I've tried varcomp from the ape package but 
> this does not return all the coefficients. How can I extract 
> the random effect coefficients without using intervals?
> 
> Rick B.
> 
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