The purpose of this example is to show one way of implementing correlated random effects.
The example is supposed to be a template for building models with correlated random effects, AND THE
PROVIDED DATASET IS NOT MEANT TO GIVE ANY MEANINGFUL RESULTS.
As a starting point we take the logistic growth-curve model studied the
orange data example. In that model there
are three parameters (f2,
of which only f1 is associated with a random effect.
Here, we extend the model by including a random effect for all three parameters,
and the random effects are allowed to be correlated as explained in
the ADMB-RE manual.