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Le 20/07/2011 13:14, Alberto Marin a écrit :
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<div>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. <br>
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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.<br>
<br>
To move the problem forward, I will create a separate bug report on
bugzilla.<br>
<br>
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When you say that you have problems when you use linpro
through the Java<br>
interface, what do you mean exactly ? Can you provide a script
?<br>
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<div>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. <br>
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<br>
I am not familiar with the javasci engine. Maybe some expert on this
topic can help...<br>
<br>
Regards,<br>
<br>
Michaël<br>
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