Message-ID: <AA818EAD2576BC488B4F623941DA74273B89A88E@inbomail.inbo.be>
Date: 2011-10-05T09:58:03Z
From: ONKELINX, Thierry
Subject: negative estimate from sd(resid(fit))
In-Reply-To: <CANHRZMx5snOHgTVG0uZtxU3QxgAV-4-6rB3Buxx_6EBAJ5C61g@mail.gmail.com>
Dear Phil,
It's hard to tell what is going wrong, if we don't know what is going on. So give us a reproducible example of your problem.
Best regards,
Thierry
> -----Oorspronkelijk bericht-----
> Van: r-sig-mixed-models-bounces at r-project.org [mailto:r-sig-mixed-models-
> bounces at r-project.org] Namens Phil Smith
> Verzonden: woensdag 5 oktober 2011 10:15
> Aan: r-sig-mixed-models at r-project.org
> Onderwerp: [R-sig-ME] negative estimate from sd(resid(fit))
>
> Hi lmer Club:
>
> I've got a model like lmer( y ~ x , 1|cluster).
>
> I'm permuting the cluster values 1000 times to obtain the nonparametric
> distribution of sigma under the null hypothesis that sigma = 0.
>
> I'm getting alot of negative values!!
>
> Am I doing something wrong, or what is going on there??
>
> Please reply directly to Phil.Smith.Duluth.GA at gmail.com .... I'm not too good at
> understanding listserves.
>
> Thanks!
> Phil Smith
> CDC
>
> [[alternative HTML version deleted]]
>
> _______________________________________________
> R-sig-mixed-models at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models