Hi,I have a problem with GLPK.
I had written a program like this:
lpx_set_prob_name(lp,"SAPP");
lpx_set_obj_dir(lp,LPX_MIN);
lpx_add_rows(lp,1);
lpx_add_cols(lp,4);
lpx_set_col_kind(lp,1,LPX_IV);
lpx_set_col_name(lp,1,"V1");
lpx_set_col_bnds(lp,1,LPX_DB,0.0,1.0);
lpx_set_col_kind(lp,2,LPX_IV);
lpx_set_col_name(lp,2,"V2");
lpx_set_col_bnds(lp,2,LPX_DB,0.0,1.0);
lpx_set_col_kind(lp,3,LPX_IV);
lpx_set_col_name(lp,3,"V3");
lpx_set_col_bnds(lp,3,LPX_DB,0.0,1.0);
lpx_set_col_kind(lp,4,LPX_IV);
lpx_set_col_name(lp,4,"V4");
lpx_set_col_bnds(lp,4,LPX_DB,0.0,1.0);
lpx_set_row_name(lp,1,"VERTEXFLOW");
lpx_set_row_bnds(lp,1,LPX_FX,0.0,0.0);
ia[1] = 1, ja[1] = 1, ar[1] = 1.0;
ia[2] = 1, ja[2] = 2, ar[2] = 1.0;
ia[3] = 1, ja[3] = 3, ar[3] = -1.0;
ia[4] = 1, ja[4] = 4, ar[4] = -1.0;
lpx_load_matrix(lp,1,ia,ja,ar);
Then I get the command:
...
lpx_print_prob(lp,"vincoli.txt");
...
The result is:
...
Row 1: VERTEXFLOW = 0
1 V1
1 V2
...
but there are not V3 and V4.
What is the problem??
The program that I show in this mail is only an example, but the real program
is very big. It has about 1500 variables and 300 constraints, so I have the
same problem about several constraints.
Can you help me?
Sorry for my bad english :-D
Thanks.
Simone Atzeni
Hi,I have a problem with GLPK.I had written a program like this:lpx_set_prob_name(lp,"SAPP");lpx_set_obj_dir(lp,LPX_MIN);lpx_add_rows(lp,1);lpx_add_cols(lp,4);lpx_set_col_kind(lp,1,LPX_IV);lpx_set_col_name(lp,1,"V1");lpx_set_col_bnds(lp,1,LPX_DB,0.0,1.0);lpx_set_col_kind(lp,2,LPX_IV);lpx_set_col_name(lp,2,"V2");lpx_set_col_bnds(lp,2,LPX_DB,0.0,1.0);lpx_set_col_kind(lp,3,LPX_IV);lpx_set_col_name(lp,3,"V3");lpx_set_col_bnds(lp,3,LPX_DB,0.0,1.0);lpx_set_col_kind(lp,4,LPX_IV);lpx_set_col_name(lp,4,"V4");lpx_set_col_bnds(lp,4,LPX_DB,0.0,1.0);lpx_set_row_name(lp,1,"VERTEXFLOW");lpx_set_row_bnds(lp,1,LPX_FX,0.0,0.0);ia[1] = 1, ja[1] = 1, ar[1] = 1.0;ia[2] = 1, ja[2] = 2, ar[2] = 1.0;ia[3] = 1, ja[3] = 3, ar[3] = -1.0;ia[4] = 1, ja[4] = 4, ar[4] = -1.0;lpx_load_matrix(lp,1,ia,ja,ar);Then I get the command:...lpx_print_prob(lp,"vincoli.txt");...The result is:...Row 1: VERTEXFLOW = 0 1 V1 1 V2...but there are not V3 and V4.What is the problem??The program that I show in this mail is only an example, but the real program is very big. It has about 1500 variables and 300 constraints, so I have the same problem about several constraints.Can you help me?Sorry for my bad english :-DThanks.Simone Atzeni
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