[R] Package contrast error

[Kuhn, Max]

Ken,


> lme.fnl.REML <- lme(Max ~ S + Tr + Yr + Tr:Yr, random = ~1 |TID,  
> method = "REML")
> 

You have three variables in the model: S, Tr and Yr.


> tst <- contrast(lme.fnl.REML, a=list(Yr=levels(Yr), Tr="R"), b=list 
> (Yr=levels(Yr, Tr="T97")))
> Error in gendata.default(fit = list(modelStruct = list(reStruct = list

> ( :
> 	not enough factors
> 

I think that you need to specify a value for S in the lists for a and b.
Also, I think that there is a typo:

  b=list(Yr=levels(Yr), Tr="T97")
 
instead of 

  b=list(Yr=levels(Yr, Tr="T97"))


> Trying to include the other factor to make R happy....
> 
> > tst <- contrast(lme.fnl.REML, a=list(Yr=levels(Yr), Tr="R"), b=list 
> (Yr=levels(Yr, Tr="T97")), c=list(Yr=levels(Yr, Tr="T98"))
> + )
> Error in contrastCalc(fit, ...) : argument 4 matches multiple formal  
> arguments


Max

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