On 11-03-18 08:42 AM, Federico Bonofiglio wrote:
> I Dears,
> if that wouldn't take u too much effort I'd like to ask for a swift opinion:
>
> I have a alinear (mixed effect) model that I wish to run as a piecewise one.
>
> When I predict the values Iget quite some odds and disturbing results:
> The predicted stright line after the break point is not straight at all,
> instead behaves like if it was a hig order polynomial or something
> similar!!!!
>
> I attach the codes below, hoping someone can point me the mistake....
>
>
> I sincerely express many thanks in advance ......
>
> Federico Bonofiglio
>
You have not given us a *reproducible* example ...
I would guess that you need I(rt>15) rather than rt>15 in your formulae.
good luck
Ben Bolker
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