help-glpk
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Help-glpk] does anyone use yoyo's GLPKSharp?


From: bo liu
Subject: Re: [Help-glpk] does anyone use yoyo's GLPKSharp?
Date: Tue, 2 Jun 2009 11:12:44 +0800

yes! it works! the GLPKSharp.dll is very useful for me ! thanks very much !

2009/5/29 yoyovicks <address@hidden>


For loadmatrix the following should work:

            int[] ia = new int[10];
            int[] ja = new int[10];
            double[] ar = new double[10];


            ia[1] = 1; ja[1] = 1; ar[1] = 1.0;   /* a[1,1] =  1 */
            ia[2] = 1; ja[2] = 2; ar[2] = 1.0;   /* a[1,2] =  1 */
            ia[3] = 1; ja[3] = 3; ar[3] = 1.0;   /* a[1,3] =  1 */
            ia[4] = 2; ja[4] = 1; ar[4] = 10.0;   /* a[2,1] = 10 */
            ia[5] = 3; ja[5] = 1; ar[5] = 2.0;   /* a[3,1] =  2 */
            ia[6] = 2; ja[6] = 2; ar[6] = 4.0;   /* a[2,2] =  4 */
            ia[7] = 3; ja[7] = 2; ar[7] = 2.0;   /* a[3,2] =  2 */
            ia[8] = 2; ja[8] = 3; ar[8] = 5.0;   /* a[2,3] =  5 */
            ia[9] = 3; ja[9] = 3; ar[9] = 6.0;   /* a[3,3] =  6 */

            LPProblem lp = new LPProblem();
            lp.AddCols(3);
            lp.AddRows(3);
            lp.LoadMatrix(ia, ja, ar);
            lp.SetRowBounds(1, BOUNDSTYPE.Upper, 0, 100);
            lp.SetRowBounds(2, BOUNDSTYPE.Upper, 0, 600);
            lp.SetRowBounds(3, BOUNDSTYPE.Upper, 0, 300);
            lp.SetObjCoef(1, 10);
            lp.SetObjCoef(2, 6);
            lp.SetObjCoef(3, 4);
            lp.ObjectiveDirection = OptimisationDirection.MAXIMISE;
            //par défaut, les bornes sont à 0.
            lp.SetColBounds(1, BOUNDSTYPE.Lower, 0, 0);
            lp.SetColBounds(2, BOUNDSTYPE.Lower, 0, 0);
            lp.SetColBounds(3, BOUNDSTYPE.Lower, 0, 0);
            //lp.WriteCPLEX("yo.lp");
            Console.Out.WriteLine(lp.SolveSimplex().ToString());
            Console.Out.WriteLine("tapez une touche.");
            Console.In.Read();

About array size, yes it is shifted by one in glpk so I have to do it in C# as well.

Yo.





--
LEO

reply via email to

[Prev in Thread] Current Thread [Next in Thread]