Hello Tony ------------------------------------------------------------ To: [email protected] Subject: [Help-glpk] Generate data section files for model (in GNU MathProg or other languages) From: Tony Khosravi <[email protected]> Date: Wed, 9 May 2012 17:13:36 +0200 ------------------------------------------------------------
> Hi, > > I would like to know if it was possible to generate any > data files in the GNU MathProg format with the GLPK > lib. > > When I am talking about data file, I mean the data > section of model data. The aim would be to be able to > generate many text files containing only the data > section so that they can be used later with the solver > and a file containing only the model section. I didn't > find any thing like that. > > My thought is now to try to implement a general lib to > generate sets or parameters in a text file according to > the documentation gmpl, but I was wondering it this had > been done before (which might be probable). > > I also had the idea of using the table statement with > the CSV driver, but apparently, it cannot be used in > the data section, only in the model section, and I > don't want to touch the file with the model. The aim is > to keep the data section separate from the model > section. > > -- > *Tony Khosravi Dehkourdi* > > MSc. Student - Computer Systems > *Link?ping University* > El?ve ing?nieur -- G?nie Informatique, Syst?mes et R?seaux d'Informations > (GI06)* > Universit? de Technologie de Compi?gne* > Tel:+46 7 60 69 51 57 Hello Tony AFAIK, once your high-level MathProg model has been translated into a low-level problem object, it is not possible to detranslate it. So I guess you are talking about doing this processing before your MathProg model + data has been irrevocably translated. You may therefore need to do this work outside of GLPK? That is my best guess anyway. These links might be useful while thinking about your problem: http://en.wikibooks.org/wiki/GLPK/Steps_of_GMPL_File_Processing http://en.wikibooks.org/wiki/GLPK/Interoperability http://en.wikibooks.org/wiki/GLPK/Scripting_plus_MathProg best regards --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : [email protected] Webmail (preferred) : [email protected] [from Webmail client] _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
