[Ipopt] Extract Objective Function Gradient in finalize_solution(...)

[Stefan Vigerske]

Hi,

On 01/18/2013 12:10 PM, Knut Heidemann wrote:
> I tried the code snippet below and get the following error:
>
> /In member function 'virtual void
> WLCNLP::finalize_solution(Ipopt::SolverReturn, Ipopt::Index, const
> Number*, const Number*, const Number*, Ipopt::Index, const Number*,
> const Number*, Ipopt::Number, const Ipopt::IpoptData*,
> Ipopt::IpoptCalculatedQuantities*)'://
> //error: invalid use of incomplete type 'struct
> Ipopt::IpoptCalculatedQuantities'//
> //error: forward declaration of 'struct Ipopt::IpoptCalculatedQuantities'/
>
> Can this be due to further missing #includes or what kind of problem do
> I face here?

Yes.
You need to include the header file where the IpoptCalculatedQuantities 
class is defined.

Stefan

>
> Best,
> Knut.
>
> Am 17.01.2013 19:21, schrieb Hans Pirnay:
>> this should work:
>>
>> SmartPtr<DenseVector> curr_grad = dynamic_cast<const
>> DenseVector*>(GetRawPtr(ip_cq->curr_grad_f()));
>> const double* grad_values = curr_grad->Values();
>>
>> You'll probably have to #include "IpDenseVector.hpp" and maybe some
>> other dependencies.
>>
>> Hans
>>
>> On Thu, Jan 17, 2013 at 6:30 PM, Knut Heidemann
>> <heidemannknut at gmail.com> wrote:
>>> Hi,
>>>
>>> I am trying to access the objective function gradient information
>>> after my
>>> problem has been solved.
>>> I assume that this is done in finalize_solution(...).
>>> Unfortunately, I do not manage to use "ip_cq" for this purpose. Can
>>> anybody
>>> tell me how the appropriate line of code would look like?
>>>
>>> Best regards,
>>> Knut Heidemann.
>>> _______________________________________________
>>> Ipopt mailing list
>>> Ipopt at list.coin-or.org
>>> http://list.coin-or.org/mailman/listinfo/ipopt
>
>
>
>
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