> When I try to set and get the columns of a row the columns index > changes. In the attached code i am adding a row with 4 columns and > then retrieving the same. For the code attached below, the output > looks like :
> 3.0*x1 5.0*x2 7.0*x3 9.0*x4 > 9.0*x4 7.0*x3 5.0*x2 3.0*x1 > While the <index, coeff> pairs are same the contents of the input and > output array has changed. I am assuming such a basic thing is probably > not a bug. What is the proper way to use the API so that my set and > get arrays contain the same value. The order of columns in the column list returned by glp_get_mat_row is not defined in the sense that you should not expect any particular ordering. This is usual practice in sparse computations. Nevertheless, you can use the routine glp_sort_mat to sort the row and column linked lists of the constraint matrix. For more details please see the glpk reference manual. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
