[R] saturated model with a given umber of interaction effects

[Peter Ehlers]

On 2011-02-13 06:54, 7tmw at queensu.ca wrote:
> 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

  y ~ (a + b + c + d + e + f)^3

or

  y ~ .^3

if the structure of your data permits.

Peter Ehlers

>
> Tristan
>
>
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