[SciPy-user] how can I get fsolve() work?!

Nils Wagner nwagner@iam.uni-stuttgart...
Fri Mar 30 09:55:20 CDT 2007


Ri Hai wrote:
>
> -----Ursprüngliche Nachricht-----
> Von: scipy-user-bounces@scipy.org [mailto:scipy-user-bounces@scipy.org] Im Auftrag von Nils Wagner
> Gesendet: Freitag, 30. März 2007 16:25
> An: SciPy Users List
> Betreff: Re: [SciPy-user] how can I get fsolve() work?!
>
> Ri Hai wrote:
>   
>> Hell folks,
>>
>> When I use fsolve, python crashes! Now I am testing fsolve with the code from the mailing list:
>>  
>> #-----------
>> from scipy.optimize import fsolve
>>  
>>  
>> def func2(x):
>>         out = [x[0]+2.*x[1]+2.*x[2]-1.]
>>         out.append(x[0]+x[2] - 2.*x[1])
>>         out.append(x[3]+x[4]-1.)
>>         out.append(1./5-2./5*x[2]+2./5*x[0]*x[3]-x[0])
>>         out.append(1./5-x[1]/5.-x[2]/5.+2/5.*x[1]*x[4]+x[1]/5.-x[1])
>>         #out.append(1/5-2/5*x[1]+2*x[2]/5+x[2]*x[3]/5)
>>         return out
>>  
>> x02 = fsolve(func2, [0.25,0.25,0.5,0.5,0.5])
>>  
>> #----------------
>> / /
>> The code is taken form the mail from john in July 2006 and he said it did work. However my python crashed again! I really don't know how to solve this problem.  
>>  
>> I use python 2.5, scipy 0.5.2, numpy 1.01 and windows XP.
>>  
>> Has someone the same problem? Can somebody help me? Please...
>>  
>> Hai 
>>     
>>  
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> SciPy-user mailing list
>> SciPy-user@scipy.org
>> http://projects.scipy.org/mailman/listinfo/scipy-user
>>   
>>     
>
> No problem here.
>   
>>>> numpy.__version__
>>>>         
> '1.0.2.dev3617'
>   
>>>> scipy.__version__
>>>>         
> '0.5.3.dev2892'
>
>   
>>>> x02
>>>>         
> array([ 0.125 , 0.1875, 0.25 , 0.5 , 0.5 ])
>   
>>>> func2(x02)
>>>>         
> [0.0, 0.0, 0.0, 3.4924590996965321e-11, -1.7462309376270468e-11]
>
> What do you mean by crash ?
>
>
> Nils
>
> ---------------------------------
> Hello Nils,
>
>
> Using fsolve, I get the following error message (in German and I have translated it): 
>
> "pythonw.exe ascertained a problem and python will be closed now."
>
> So I could not even know what is wrong. 
>
> I have tried with your commands. You can see the information below.    
>
>   
>>>> numpy.__version__
>>>>         
> '1.0.1'
>   
>>>> scipy.__version__
>>>>         
> '0.5.2'
>
> Is there anything wrong with the version I have taken?
>
>   
I don't think so. It seems to be a Windows specific problem.

Nils

> Hai
>
>
>
> _______________________________________________
> SciPy-user mailing list
> SciPy-user@scipy.org
> http://projects.scipy.org/mailman/listinfo/scipy-user
>   

 


More information about the SciPy-user mailing list