Hello 

I have the following model

y ~ a + b + c + d + e + f 

I would like to look at all possible 3 way interaction, is it possible to do this without typing out each interaction manually? Is there some way to run a saturated model permitting only 2 and 3 way interactions (As opposed to considering up to 6 way, which I do not need). any suggesting would be greatly appreciated, thanks 

Tristan 


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