Examples with ExpressionsBasedModel org.ojalgo.optimisation.ExpressionsBasedModel used on opensource projects

Example 11 with ExpressionsBasedModel

use of org.ojalgo.optimisation.ExpressionsBasedModel in project ojAlgo by optimatika.

the class SpecificBranchCase method testVpm2FirstBranch.

@Test
public void testVpm2FirstBranch() {
    final File tmpFile = new File(MipLibCase.PATH + "vpm2.mps");
    final MathProgSysModel tmpMPS = MathProgSysModel.make(tmpFile);
    final ExpressionsBasedModel tmpModel = tmpMPS.getExpressionsBasedModel();
    TestUtils.assertTrue(tmpModel.validate());
    final ExpressionsBasedModel tmpLowerBranchModel = tmpModel.relax(false);
    final ExpressionsBasedModel tmpUpperBranchModel = tmpModel.relax(false);
    tmpLowerBranchModel.getVariable(106).upper(BigMath.ZERO);
    tmpUpperBranchModel.getVariable(106).lower(BigMath.ONE);
    final Optimisation.Result tmpLowerResult = tmpLowerBranchModel.minimise();
    final Optimisation.Result tmpUpperResult = tmpUpperBranchModel.minimise();
    final State tmpLowerState = tmpLowerResult.getState();
    final State tmpUpperState = tmpUpperResult.getState();
    if (!tmpLowerState.isFeasible() && !tmpUpperState.isFeasible()) {
        TestUtils.fail("Both these branches cannot be infeasible!");
    }
    tmpLowerBranchModel.minimise();
    if (tmpLowerState.isFeasible() && !tmpLowerBranchModel.validate(MipLibCase.PRECISION)) {
        TestUtils.fail(MipLibCase.SOLUTION_NOT_VALID);
    }
    tmpUpperBranchModel.minimise();
    if (tmpUpperState.isFeasible() && !tmpUpperBranchModel.validate(MipLibCase.PRECISION)) {
        TestUtils.fail(MipLibCase.SOLUTION_NOT_VALID);
    }
}

Example 12 with ExpressionsBasedModel

use of org.ojalgo.optimisation.ExpressionsBasedModel in project ojAlgo by optimatika.

the class UCLAee236aCase method testRelaxedNodeP06.

/**
 * P6
 */
@Test
public void testRelaxedNodeP06() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel().relax(true);
    tmpModel.getVariable(0).lower(THREE);
    tmpModel.getVariable(1).lower(TWO);
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertEquals(State.INFEASIBLE, tmpResult.getState());
}

Example 13 with ExpressionsBasedModel

use of org.ojalgo.optimisation.ExpressionsBasedModel in project ojAlgo by optimatika.

the class UCLAee236aCase method testRelaxedNodeP01.

/**
 * P1
 */
@Test
public void testRelaxedNodeP01() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel().relax(true);
    tmpModel.getVariable(0).upper(TWO);
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertEquals(State.OPTIMAL, tmpResult.getState());
    final PrimitiveDenseStore tmpExpX = PrimitiveDenseStore.FACTORY.rows(new double[][] { { 2.00 }, { 2.14 } });
    TestUtils.assertEquals(tmpExpX, tmpResult, PRECISION);
    TestUtils.assertEquals(-10.43, tmpModel.minimise().getValue(), PRECISION);
}

Example 14 with ExpressionsBasedModel

use of org.ojalgo.optimisation.ExpressionsBasedModel in project ojAlgo by optimatika.

the class UCLAee236aCase method testRelaxedNodeP09.

/**
 * P9
 */
@Test
public void testRelaxedNodeP09() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel().relax(true);
    tmpModel.getVariable(0).lower(THREE);
    tmpModel.getVariable(1).upper(ONE);
    tmpModel.getVariable(0).lower(FOUR);
    tmpModel.getVariable(1).upper(ZERO);
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertEquals(State.OPTIMAL, tmpResult.getState());
    final PrimitiveDenseStore tmpExpX = PrimitiveDenseStore.FACTORY.rows(new double[][] { { 4.50 }, { 0.00 } });
    TestUtils.assertEquals(tmpExpX, tmpResult, PRECISION);
    TestUtils.assertEquals(-9.00, tmpModel.minimise().getValue(), PRECISION);
}

Example 15 with ExpressionsBasedModel

use of org.ojalgo.optimisation.ExpressionsBasedModel in project ojAlgo by optimatika.

the class UCLAee236aCase method testRelaxedNodeP07.

/**
 * P7
 */
@Test
public void testRelaxedNodeP07() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel().relax(true);
    tmpModel.getVariable(0).lower(THREE);
    tmpModel.getVariable(1).upper(ONE);
    tmpModel.getVariable(0).upper(THREE);
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertEquals(State.OPTIMAL, tmpResult.getState());
    final PrimitiveDenseStore tmpExpX = PrimitiveDenseStore.FACTORY.rows(new double[][] { { 3.00 }, { 1.00 } });
    TestUtils.assertEquals(tmpExpX, tmpResult, PRECISION);
    TestUtils.assertEquals(-9.00, tmpModel.minimise().getValue(), PRECISION);
}