Hi all,
update.formula does not seem to correctly update (i.e. remove in my case)
offset terms.
Here is an example:
update(~x + offset(z), ~ . - offset(z))
> ~x + offset(z)
Also:
update(~x, ~ . - offset(z))
> ~x + offset(z)
In both cases, I would expect the result
> ~x
as - <term> should remove <term> from the formula as happens for instance
in:
update(~x + z, ~ . - z)
> ~x
I don't know if this behavior is intentional but I would say it is at least
unfortunate.
Paul
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