Displaying 2 results from an estimated 2 matches for "l814".
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6814
2024 Sep 23
1
model.matrix() may be misleading for "lme" models
> I can't tell whether evaluating object$call$data in
environment(object$formula) is a better or worse idea than parent.frame().
I have struggled with this a lot over the years. There is a bunch of
wonky code in lme4, e.g. here
<https://github.com/lme4/lme4/blob/master/R/lmer.R#L814-L838>, that
tries to look for data in different possible locations, but I don't
think anything works perfectly/robustly.
https://stackoverflow.com/questions/14945274/determine-whether-evaluation-of-an-argument-will-fail-due-to-non-existence
On Mon, Sep 23, 2024 at 3:54?PM Ivan Krylov via R...
2024 Sep 23
1
model.matrix() may be misleading for "lme" models
? Sun, 22 Sep 2024 10:23:50 -0400
John Fox <jfox at mcmaster.ca> ?????:
> > Evaluating object$call$data in the environment of the suggested
> > nlme:::model.matrix.lme function may also not work right. Without an
> > explicit copy of the data, the best environment to evaluate it in
> > would be parent.frame().
>
> I'm afraid that I don't understand