[
https://issues.apache.org/jira/browse/MATH-819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Thomas Neidhart updated MATH-819:
---------------------------------
Attachment: lp-octave.txt
an octave version of the same problem.
Octave uses glpk which does not find a solution either. glpk does a scaling of
the coefficient matrix by default, which would be a nice addition to
commons-math too imho.
> SimplexSolver - InfeasibleSolution when feasible
> ------------------------------------------------
>
> Key: MATH-819
> URL: https://issues.apache.org/jira/browse/MATH-819
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.1
> Environment: Windows 7, JDK 1.7.0_03
> Reporter: Raghu Rangarajan
> Attachments: CommonsSolver2.java, lp-octave.txt
>
>
> I am seeing an odd behavior with the latest code in the main trunk (Directory
> revision: 1358535). The solver throws "NoFeasibleSolutionException" for a
> problem which has a feasible solution. Just by commenting out the last
> constraint, we get a feasible solution. And for that solution, the constraint
> in question does not seem to be playing a role.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
