On Wed, 2018-04-04 at 10:41 -0400, marky1991 . wrote: > I'm trying to solve a problem that has noninteger bounds for its > variables, the problem and the outputted solution attached. I'm > invoking glpsol with the command "glpsol --lp > parents_allocated-pulp.lp -o parents_allocated-pulp.sol --mipgap > 0.000001". > > > The trouble is that the upper bound for my "x2" variable is being > limited to "217.351" instead of the given "217.3512" and I'm not sure > why. Is there some parameter I can pass to make it go past 3 decimal > places for the upper bound?
There is nothing wrong. You see 217.351 rather than 217.3512 because glpsol prints the solution report only with 6 decimal places. > > > I tried --exact and every other parameter that I could see but none > helped. Is there some way to increase the number of digits in the > bounds? > > > My output with 4.65: > > GLPSOL: GLPK LP/MIP Solver, v4.65 > Parameter(s) specified in the command line: > --lp parents_allocated-pulp.lp -o parents_allocated-pulp2.sol > --mipgap 0.000001 > Reading problem data from 'parents_allocated-pulp.lp'... > 2 rows, 7 columns, 8 non-zeros > 6 integer variables, none of which are binary > 22 lines were read > GLPK Integer Optimizer, v4.65 > 2 rows, 7 columns, 8 non-zeros > 6 integer variables, none of which are binary > Preprocessing... > 1 row, 2 columns, 2 non-zeros > 2 integer variables, none of which are binary > Scaling... > A: min|aij| = 1.000e+00 max|aij| = 7.000e+00 ratio = 7.000e+00 > Problem data seem to be well scaled > Constructing initial basis... > Size of triangular part is 1 > Solving LP relaxation... > GLPK Simplex Optimizer, v4.65 > 1 row, 2 columns, 2 non-zeros > * 0: obj = 1.100000000e+01 inf = 0.000e+00 (1) > * 1: obj = 3.300000000e+01 inf = 0.000e+00 (0) > OPTIMAL LP SOLUTION FOUND > Integer optimization begins... > Long-step dual simplex will be used > + 1: mip = not found yet <= +inf (1; 0) > + 1: >>>>> 3.300000000e+01 <= 3.300000000e+01 0.0% (1; 0) > + 1: mip = 3.300000000e+01 <= tree is empty 0.0% (0; 1) > INTEGER OPTIMAL SOLUTION FOUND > Time used: 0.0 secs > Memory used: 0.1 Mb (59394 bytes) > Writing MIP solution to 'parents_allocated-pulp.sol'... > > > Thanks for the help. > > _______________________________________________ > Help-glpk mailing list > Help-glpk@gnu.org > https://lists.gnu.org/mailman/listinfo/help-glpk _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk