Thanks Peter! That clarifies why it felt I was chasing ghosts these past
days :) Thanks for the tip about coxph as well, there's some nice ideas to
be discovered there.
Cheers
Joris
On Fri, Oct 3, 2014 at 3:02 PM, peter dalgaard wrote:
>
> On 03 Oct 2014, at 14:32 , Joris Meys wrote:
>
> > Dea
Joris,
Basically, the I() function, as it is used in a regression model, allows
the user to perform arithmetic operations on a variable that would
otherwise be interpreted by the formula. It is not trapped as a special
function as Error() is in aov().
There may be other applications where the c
On 03 Oct 2014, at 14:32 , Joris Meys wrote:
> Dear all,
>
> I'm updating a package regarding a new type of models, and I'm looking to
> extend the formula interface with two functions (L() and R() ) for
> construction of these models. I want to use as much of the formula
> interface as possibl
