[R] Log-likelihood calculation in lme

From: PIERRE-JOSEPH tessa <tessap_j_at_yahoo.fr>
Date: Thu 19 May 2005 - 23:54:55 EST

On a real data set, running the lme function, I get parameters estimation and a log-likelihood value. Nevertheless, the variance-covariance matrix in this case had a determinant close to zero. So, I could not calculate the log-likelihood myself with the classical expression.
What is the calculus made in lme?
Thanks for all suggestions.

Tessa P-J

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu May 19 23:59:09 2005

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