[scilab-Users] Re: Linear programming with scilab 5

[Michaël Baudin]

I created the bug report : http://bugzilla.scilab.org/show_bug.cgi?id=9751

Regards,

Michaël Baudin

Le 20/07/2011 14:49, Michaël Baudin a écrit :
> Le 20/07/2011 13:14, Alberto Marin a écrit :
>>
>>
>>
>> This kind of rank deficiency is very frequent in this kind of problem 
>> (biochemical networks) and has never been a problem using the simplex 
>> method. Since the only thing I know about the karmarkar algorithm is 
>> that it is an interior point method, I have no clue about what the 
>> error message about rank deficiency means. I have tried eliminating 
>> the redundancies but the reesult is the same so the error may refer 
>> to a completely different issue.
>
> The "karmarkar" function has a very poor name: it does *not* implement 
> Karmarkar's algorithm... The algorithm used in the function is based 
> on the primal affine scaling algorithm, as discovered by Dikin in 
> 1967, and then re-discovered by Barnes and Vanderbei et al in 1986.
>
> To move the problem forward, I will create a separate bug report on 
> bugzilla.
>
>>
>>     When you say that you have problems when you use linpro through
>>     the Java
>>     interface, what do you mean exactly ? Can you provide a script ?
>>
>> If I  put this problem in an .sce file and execute it, I get the 
>> result you mention. No problem so far. If I call linpro from the java 
>> interface with the Siclab.exec() method it also works fine as long as 
>> I use a 32 bits machine. But calling linpro through  the exec() 
>> method in any linux 64 bits machine crashes the java virtual machine. 
>> This same problem happened whenever I called the javasci engine with 
>> scilab 4.2 but in 5.3 it is restricted to the linpro function, any 
>> other operation I've tried so far (including karmarkar) seem to work 
>> fine.
>
> I am not familiar with the javasci engine. Maybe some expert on this 
> topic can help...
>
> Regards,
>
> Michaël


-- 
Michaël Baudin
Ingénieur de développement
michael.baudin at scilab.org
-------------------------
Consortium Scilab - Digiteo
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