[R] Anova interaction not tested

[Patrick Connolly]

On Wed, 08-Apr-2009 at 12:59PM -0700, Gabriel Murray wrote:

|> I've noticed with certain datasets that when I try to do an anova and test
|> for main effects and interaction for two explanatory variables, sometimes
|> the main effect results are given but not the interaction results. For
|> example,
|> 
|> ex1 = aov(Score ~ var1*var2, data=myData)
|> summary(ex1)

Could it be that there are no degrees of freedom left?

That's about my best guess without enough information.


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|> and provide commented, minimal, self-contained, reproducible code.


Nothing you sent is reproducible.


-- 
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.   
   ___    Patrick Connolly   
 {~._.~}                   Great minds discuss ideas    
 _( Y )_  	         Average minds discuss events 
(:_~*~_:)                  Small minds discuss people  
 (_)-(_)  	                      ..... Eleanor Roosevelt
	  
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