[ADMB Users] Question about R2admb

[dave fournier]

I'm not sure exaclty what is wanted, but it does suggest  that one may 
want something like the following function
which I suppose could get added to ADMB in some form.

It should be

                        a if x<=c-e
            f(x) =
                        b if x>=c+e

            f'(x-e)=0
            f'(x+e)=0

          f is nice for c-e<x<c+e

this can be done with a cubic spline.   A nice way is to
declare a class to hold the necessary information and a function object 
or functor
to evaluate the function .  It could be extended to deal with more 
general boundary
conditions

           f'(x-e)=u
           f'(x+e)=v

with a bit of care.


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