[R] understanding I() in lmer formula
bgunter.4567 at gmail.com
Tue Jun 13 21:12:37 CEST 2017
If you don't get a prompt reply here, you might do better posting this
on the r-sig-mixed-models list (for obvious reasons).
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and sticking things into it."
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On Tue, Jun 13, 2017 at 11:25 AM, Don Cohen <don-r-help at isis.cs3-inc.com> wrote:
> Is there a difference between I(x*y) and I(y*x) ?
> I have a call to lmer that results in this complaint:
> Error in is.alpha2.subordinate * ~z.min.co.res :
> non-numeric argument to binary operator
> when I change this line:
> to this:
> the complaint goes away.
> I'd like to understand why.
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