[R] what "~1"stands for?

[James W. MacDonald]

?formula

孟欣 wrote:
> Hi all:
> In the expression:
> lme(y~1,random=~1|time)
> 
> What "~1" stands for?
>  
> Thanks a lot!
>  
>  
> 	[[alternative HTML version deleted]]
> 
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-- 
James W. MacDonald, M.S.
Biostatistician
Douglas Lab
University of Michigan
Department of Human Genetics
5912 Buhl
1241 E. Catherine St.
Ann Arbor MI 48109-5618
734-615-7826
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