Displaying 3 results from an estimated 3 matches for "mixedeffects".
2006 Oct 05
2
treatment effect at specific time point within mixedeffects model
...bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
> Afshartous, David
> Sent: Thursday, October 05, 2006 11:08 AM
> To: Spencer Graves
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] treatment effect at specific time point
> within mixedeffects model
>
> Hi Spencer,
>
> Thanks for your reply.
> I don't think this answers my question.
>
> If I understand correctly, your model simply removes the
> intercept and thus the intercept in fm1 is the same as the
> first time factor in fm1a ... but am I confused...
2002 Jul 05
1
robust mixed effects models
I'd like to apply the ideas of
Pinheiro et al. (1997): "Robust Estimation in LInear Mixed Effects Models
using the Multivariate t-Distribution" and I'm wondering if the EM-based
estimation described in that paper has been implemented by somebody in R
already (I'm assuming it's not yet available within the package nlme --
whose subtitle is "Fit and compare
2012 May 21
1
Syntax for lme function to model random factors and interactions
Hello,
I have a question regarding the syntax of the lme function in the nlme
package. What I'm trying to do is to calculate an estimate of R^2 based on
the likelihood ratio test. For this calculation, I need to determine the
maximum log-likelihood of the intercept-only model and the model of interest
(with the desired factors and interactions).
My model has four independent factors (i.e. A,