[R-sig-ME] Another case of -1.0 correlation of random effects

[Ken Knoblauch]

Kevin E. Thorpe <kevin.thorpe at ...> writes:

> My data come from a crossover trial and are balanced.
> 
>  > str(gluc)
> 'data.frame':	96 obs. of  4 variables:
>   $ Subject  : int  1 2 3 5 6 7 10 11 12 13 ...
>   $ Treatment: Factor w/ 2 levels "Barley","Oat": 1 1 1 1 1 1 1 1 1 1 ...
>   $ Dose     : int  8 8 8 8 8 8 8 8 8 8 ...
>   $ iAUC     : num  110 256 129 207 244 ...
> 

>clip>

Shouldn't you make Subject into a factor?

Ken

-- 
Ken Knoblauch
Inserm U846
Stem-cell and Brain Research Institute
Department of Integrative Neurosciences
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