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

[Kevin E. Thorpe]

Ken Knoblauch wrote:
> 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
> 

I just tried that and it had no effect on the results.

-- 
Kevin E. Thorpe
Biostatistician/Trialist, Knowledge Translation Program
Assistant Professor, Dalla Lana School of Public Health
University of Toronto
email: kevin.thorpe at utoronto.ca  Tel: 416.864.5776  Fax: 416.864.3016