[SciPy-dev] openopt and algencan

dmitrey dmitrey.kroshko@scipy....
Thu Mar 20 15:05:33 CDT 2008


Nils Wagner wrote:
> On Thu, 20 Mar 2008 20:32:53 +0200
>   dmitrey <dmitrey.kroshko@scipy.org> wrote:
>   
>> Nils, try using p.xlabel = 'nf'
>>
>> this is temporary name for "number of function 
>> evaluations", I will 
>> think what is better name for the case, and then commit 
>> it into OO doc.
>>
>> This is more appropriate vs your "iteration" that you 
>> have chosen for 
>> your x label.
>> Your "iteration" is just a single objfunc evaluation, 
>> while users will 
>> suppose solvers have different iterations with different 
>> number of 
>> objFunc evaluations in each one.
>>
>> Also, take into account, that ralg can yield infeasible 
>> iteration 
>> points, so your single-subplot picture doesn't provide 
>> all convergence info.
>> Ralg is intended to handle lb-ub problems more bette in 
>> future.
>> Regards, D.
>>
>>
>>
>> Nils Wagner wrote:
>>     
>>> On Thu, 20 Mar 2008 19:03:25 +0200
>>>   dmitrey <dmitrey.kroshko@scipy.org> wrote:
>>>   
>>>       
>>>> Hi Nils,
>>>> I have made some changes to svn, try using ALGENCAN now.
>>>>     
>>>>         
>>>   
>>> Great ! It works for me. Thank you very much !
>>>
>>> Nils
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>>>
>>>
>>>   
>>>       
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>
> Hi Dmitrey,
>
> Thank you for your comments.
>
> BTW, do you have an
> optional specification file algencan.dat
> that you can send me ?
>
> I just noticed the message
>
>   The optional specification file algencan.dat was not 
> found in the current
>   directory (this is not a problem nor an error). The 
> default values for the
>   ALGENCAN parameters will be used.
>
>   ALGENCAN PARAMETERS:
>   rhoauto  =                    T
>   rhotype  =                    1
>   rhomult  =           1.0000E+01
>   rhofrac  =           5.0000E-01
>   gtype    =                    0
>   hptype   =                    6
>   intype   =                    0
>   precond  =               QNCGNA
>   checkder =                    F
>   epsfeas  =           1.0000E-06
>   epsopt   =           1.0000E-06
>   maxoutit =                   50
>   maxtotit =                 1000
>   maxtotfc =                10000
>   iprint   =                    0
>   ncomp    =                    5
>   
This output is generated by ALGENCAN, not OO.
You'd better contact ALGENCAN developers about the file.
Regards, D.
> ALGENCAN has finished solving the problem unnamed
> istop:  2 (|| gradient F(X[k]) || < gradtol)
> Solver:   Time Elapsed = 0.21   CPU Time Elapsed = 0.2
> objFunValue: 443.752171145 (feasible, max constraint =  0)
>
> Nils
>
>   
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