Re: [R] singular variance-covariance warning in lmer

rom: Ista Zahn [istaz...@gmail.com] Sent: 29 October 2009 14:35 To: Weber, Sam Cc: r-help@R-project.org Subject: Re: [R] singular variance-covariance warning in lmer Hi Sam, Just a stab in the dark here, but is your grouping variable really female? What does str(data.frame(mean.sst, female) loo

Re: [R] singular variance-covariance warning in lmer

Hi Sam, Just a stab in the dark here, but is your grouping variable really female? What does str(data.frame(mean.sst, female) look like? How many levels does female have? -Ista On Thu, Oct 29, 2009 at 7:10 AM, Weber, Sam wrote: > Dear R Users, > > I was hoping for some help with a recurrent er

[R] singular variance-covariance warning in lmer

Dear R Users, I was hoping for some help with a recurrent error message in lmer. I am trying to model the effect of temperature on metabolic rate in animals (response = int.length) at different temperatures (mean.sst), with repeated measurements on the same individuals (random effect = female).