> 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 :
A reproducible example would help ...
In the absence of that, check the classes of the two variables in I() and, if
you run the product on the command line, either inside I() or not, what's the
class of the result?
If that is order-dependent for the object types you're combining, while I don't
know why that might be it would go some way to explaining the outcome.
S Ellison
*******************************************************************
This email and any attachments are confidential. Any use...{{dropped:8}}
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
