[RBFOpt] Running example in RBFOpt

[Chuong Thaidoan]

Dear Giacomo,
Thank you for your prompt reply. I already set the Path in the second line
of the Python code, which is as follows:

settings = rbfopt.RbfoptSettings(minlp_solver_path='/home/chuong/bonmin-stable/build/bonmin',\

nlp_solver_path='/home/chuong/bonmin-stable/build/ipopt')

or

import rbfopt
settings = rbfopt.RbfoptSettings(minlp_solver_path='Cygwin64/home/chuong/bonmin-stable/build/bonmin',\

nlp_solver_path='Cygwin64/home/chuong/bonmin-stable/build/ipopt')


On Thu, Sep 24, 2020 at 10:43 AM Giacomo Nannicini <giacomo.n at gmail.com>
wrote:

> I do not understand the order of the code in the Python snippet.
> If bonmin and ipopt are not in your part, you must set the
> corresponding options in the RbfoptSettings object that is passed to
> RbfoptAlgorithm.
>
> Giacomo
>
> On Wed, Sep 23, 2020 at 8:38 PM Chuong Thaidoan
> <chuongthaidoan at gmail.com> wrote:
> >
> > Dear Giacomo,
> > Thank you for your advice. I have just to re-install Bonmin and run the
> code. It shows errors as follows. Could you please take a look and let me
> know some further comments?
> > Iter  Cycle  Action             Objective value      Time      Gap
> >   ----  -----  ------             ---------------      ----      ---
> >      0      0  Initialization           -0.782797      0.01   100.00 *
> >      0      0  Initialization           69.095477      0.01   100.00
> >      0      0  Initialization           20.000000      0.01   100.00
> >      0      0  GlobalStep               -9.829600      0.03   100.00 *
> >      1      0  GlobalStep               -9.946732      0.06   100.00 *
> >      2      0  GlobalStep               -0.133622      0.08   100.00
> >      3      0  GlobalStep               -8.304083      0.10   100.00
> >      4      0  GlobalStep               -9.999968      0.12   100.00 *
> > Traceback (most recent call last):
> >   File
> "C:/Users/chuong/PycharmProjects/LearningPython/Ipopt/RBFOpt_test_ipopt.py",
> line 14, in <module>
> >     val, x, itercount, evalcount, fast_evalcount = alg.optimize()
> >   File
> "C:\ProgramData\Anaconda3\lib\site-packages\rbfopt\rbfopt_algorithm.py",
> line 795, in optimize
> >     self.optimize_serial(pause_after_iters)
> >   File
> "C:\ProgramData\Anaconda3\lib\site-packages\rbfopt\rbfopt_algorithm.py",
> line 1056, in optimize_serial
> >     self.node_is_noisy)
> >   File
> "C:\ProgramData\Anaconda3\lib\site-packages\rbfopt\rbfopt_algorithm.py",
> line 2438, in local_step
> >     categorical_info, node_pos, rbf_lambda, rbf_h, node_pos[fmin_index])
> >   File
> "C:\ProgramData\Anaconda3\lib\site-packages\rbfopt\rbfopt_aux_problems.py",
> line 297, in minimize_rbf
> >     if (not opt.available()):
> >   File
> "C:\ProgramData\Anaconda3\lib\site-packages\pyomo\opt\base\solvers.py",
> line 99, in available
> >     raise pyutilib.common.ApplicationError("Solver (%s) not available" %
> str(self.name))
> > pyutilib.common._exceptions.ApplicationError: Solver (bonmin) not
> available
> >
> > Your code:
> >
> > import rbfopt
> >
> > settings =
> rbfopt.RbfoptSettings(minlp_solver_path='/home/chuong/bonmin-stable/build/bonmin',\
> >
> nlp_solver_path='/home/chuong/bonmin-stable/build/ipopt')
> >
> > import numpy as np
> > def obj_funct(x):
> >   return x[0]*x[1] - x[2]
> >
> > bb = rbfopt.RbfoptUserBlackBox(3, np.array([0] * 3), np.array([10] * 3),
> >                                np.array(['R', 'I', 'R']), obj_funct)
> > settings = rbfopt.RbfoptSettings(max_evaluations=50)
> > alg = rbfopt.RbfoptAlgorithm(settings, bb)
> > val, x, itercount, evalcount, fast_evalcount = alg.optimize()
> >
> >
> > On Wed, Sep 23, 2020 at 11:43 PM Giacomo Nannicini <giacomo.n at gmail.com>
> wrote:
> >>
> >> You need both executables. You can download them from AMPL's website.
> If you compile from scratch, then Bonmin will also compile Ipopt.
> >>
> >> If the executables are not in the system path, you can specify their
> location via options.
> >>
> >>
> >> G
> >>
> >>
> >> On Wed, Sep 23, 2020, 9:36 AM Chuong Thaidoan <chuongthaidoan at gmail.com>
> wrote:
> >>>
> >>> Dear Giacomo,
> >>> Thank you for your email. I am re-installing Bonmin because it still
> shows errors although I already specified the Path. Can I ask it is true
> that Bonmin contains Ipopt and so we only need to install Bonmin with
> Cygwin 64?
> >>> Best regards,
> >>> TD Chuong
> >>>
> >>> On Wed, Sep 23, 2020 at 10:46 PM Giacomo Nannicini <
> giacomo.n at gmail.com> wrote:
> >>>>
> >>>> Chuong,
> >>>> please read the instruction manual, section 1.2. You need Bonmin and
> >>>> Ipopt to be in your system path, or otherwise you need to specify
> >>>> their location as options.
> >>>>
> >>>> Best,
> >>>>
> >>>> Giacomo
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> Dear the authors,
> >>>> I am studying your interesting black-box function packages (RBFOpt),
> >>>> and I just install it with Bonmin-1.8.8 solver via Cygwin64. I put
> >>>> your "minimal working example" in Bonmin-1.8.8 folder and run it with
> >>>> Pycharm. However, it shows errors
> >>>> "pyutilib.common._exceptions.ApplicationError: Solver (bonmin) not
> >>>> available".
> >>>>
> >>>> Could you please let me know some your advice? Thank you.
> >>>> Best regards,
> >>>> Chuong Thai Doan
> >>>> Research Fellow at School of Information Technology
> >>>> Deakin University, Melbourne, Australia
>
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