Displaying 2 results from an estimated 2 matches for "2_error".
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2002 Apr 03
0
help on lme and variance estimation
Hi all,
I have a random effect model that can be written as
y_{ij} = \beta +\alpha_i+ \epslion_{ij}
where \alpha_i ~ N(0,\sigma^2_effect) and \espilon_{ij} ~
N(0,\sigma^2_error)
and i compute
res<-lme(data~1,data=Data,random=~1 | veci)
The estimation of \sigma_error is given by res$sigma but
I don't understand how i can find the estimation of \sigma _effect with
the object res
(I would like to have access to the value of the estimation and not
print the resu...
2008 Jan 31
0
How to calculate Intraclass-coefficient in 2-level Linear Mixed-Effects models?
...the
literature, I did not find an example for these kind of komplex models.
For 1-level Random-Intercept models it would be easy:
ICC = variance due to the clustering variable / (variance due to the
clustering variable + variance remaining) = sigma^2_RandomIntercept /
(sigma^2_RIntercept + sigma^2_error)
My data are similar to Pixel-Data from R-package nlme:
=> Please assume an adequate model is the following (although you really do
not need the Random Slope on Level "Side within Dog" here... and an adequate
model is also different concerning fixed effects):
-------------------------...