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From: | Kevin Hunter |
Subject: | Re: [Help-glpk] Can GLPK set multiple objectives? |
Date: | Wed, 11 Aug 2010 22:33:04 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 |
At 9:53am -0500 Tue, 10 Aug 2010, xiaomi wrote:
For example, I have 3 objectives to minimize: X,Y,Z. I want to first minimize X, then substitute some value of the solution(like X) into the original LP file to solve minimum Y. Then subustitute other value of solution to solve minimum Z. Is this feasible?
Your goal is not exactly clear. If you're asking "is this 'feasible'?" in the mathematical optimization sense, then you tell us; it's your model. If you mean "feasible" in the "what tools do I need?" sense, then yes, it's possible. Almost any tool you'd like, from Python or Perl spitting out an LP file and reading the GLPK -o or -w outputs, or from a more tailored tool, like Sandia's COOPR Pyomo project:
https://software.sandia.gov/trac/coopr/ https://software.sandia.gov/trac/coopr/wiki/PyomoYou can also do similar with more proprietary systems like AMPL, but I leave the non-open source tools for you to figure out.
Kevin
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