coef<-.tramME: Set coefficients of a tramME model.
Description
Sets the whole vector of coefficients of a tramME model. The parameters of
the baseline transformation function should respect the restrictions of
the parameter space. This is checked before setting the new parameter values
provided that the parameters for the variance components has already been set.
If the model contains fixed coefficient parameters, the input should also respect
that.
When called on a fitted tram object, the function sets it to unfitted and removes
all parts that come from the estimation.