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

Example 16 with ExpressionsBasedModel

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

the class UCLAee236aCase method testRelaxedNodeP04.

/**
 * P4
 */
@Test
public void testRelaxedNodeP04() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel().relax(true);
    tmpModel.getVariable(0).upper(TWO);
    tmpModel.getVariable(1).lower(THREE);
    // tmpModel.options.debug_stream = BasicLogger.DEBUG;
    // tmpModel.options.debug_solver = LinearSolver.class;
    // tmpModel.options.validate = true;
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertStateNotLessThanOptimal(tmpResult);
    final PrimitiveDenseStore tmpExpX = PrimitiveDenseStore.FACTORY.rows(new double[][] { { 0.00 }, { 3.00 } });
    TestUtils.assertEquals(tmpExpX, tmpResult, PRECISION);
    TestUtils.assertEquals(-9.00, tmpModel.minimise().getValue(), PRECISION);
}

Example 17 with ExpressionsBasedModel

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

the class UCLAee236aCase method testFullMIP.

/**
 * http://www.ee.ucla.edu/ee236a/lectures/intlp.pdf
 */
@Test
public void testFullMIP() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel();
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertEquals(State.OPTIMAL, tmpResult.getState());
    final PrimitiveDenseStore tmpExpX = PrimitiveDenseStore.FACTORY.rows(new double[][] { { 2.0 }, { 2.0 } });
    TestUtils.assertEquals(tmpExpX, tmpResult, PRECISION);
}

Example 18 with ExpressionsBasedModel

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

the class UCLAee236aCase method testRelaxedNodeP02.

/**
 * P2
 */
@Test
public void testRelaxedNodeP02() {
    final ExpressionsBasedModel tmpModel = UCLAee236aCase.makeOriginalRootModel().relax(true);
    tmpModel.getVariable(0).lower(THREE);
    final Optimisation.Result tmpResult = tmpModel.minimise();
    TestUtils.assertEquals(State.OPTIMAL, tmpResult.getState());
    final PrimitiveDenseStore tmpExpX = PrimitiveDenseStore.FACTORY.rows(new double[][] { { 3.00 }, { 1.33 } });
    TestUtils.assertEquals(tmpExpX, tmpResult, PRECISION);
    TestUtils.assertEquals(-10.00, tmpModel.minimise().getValue(), PRECISION);
}

Example 19 with ExpressionsBasedModel

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

the class BurkardtDatasetsMps method testMPSempstest.

/**
 * A simple test file primarily useful for checking the compression and decompression programs. Don't
 * think this model was designed to be solved; so I don't try to.
 */
@Test
public void testMPSempstest() {
    final File tmpFile = new File(PATH + "empstest.mps");
    final MathProgSysModel tmpMPS = MathProgSysModel.make(tmpFile);
    final ExpressionsBasedModel tmpModel = tmpMPS.getExpressionsBasedModel();
    this.assertMinMaxVal(tmpModel, null, null);
}

Example 20 with ExpressionsBasedModel

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

the class BurkardtDatasetsMps method testMPStestprob.

/**
 * A simple problem with 4 rows and 3 variables. I got my version from here (same numbers but different
 * names): <a href="http://en.wikipedia.org/wiki/MPS_(format)">testprob@wikipedia</a> and/or
 * <a href="http://lpsolve.sourceforge.net/5.5/mps-format.htm">testprob@lpsolve</a>
 */
@Test
public void testMPStestprob() {
    final Variable tmpXONE = new Variable("XONE").weight(ONE).lower(ZERO).upper(FOUR);
    final Variable tmpYTWO = new Variable("YTWO").weight(FOUR).lower(NEG).upper(ONE);
    final Variable tmpZTHREE = new Variable("ZTHREE").weight(NINE).lower(ZERO).upper(null);
    final Variable[] tmpVariables = new Variable[] { tmpXONE, tmpYTWO, tmpZTHREE };
    final ExpressionsBasedModel tmpExpModel = new ExpressionsBasedModel(tmpVariables);
    final Expression tmpLIM1 = tmpExpModel.addExpression("LIM1");
    for (int v = 0; v < tmpVariables.length; v++) {
        tmpLIM1.set(v, new BigDecimal[] { ONE, ONE, ZERO }[v]);
    }
    tmpLIM1.upper(FIVE);
    final Expression tmpLIM2 = tmpExpModel.addExpression("LIM2");
    for (int v = 0; v < tmpVariables.length; v++) {
        tmpLIM2.set(v, new BigDecimal[] { ONE, ZERO, ONE }[v]);
    }
    tmpLIM2.lower(TEN);
    final Expression tmpMYEQN = tmpExpModel.addExpression("MYEQN");
    for (int v = 0; v < tmpVariables.length; v++) {
        tmpMYEQN.set(v, new BigDecimal[] { ZERO, ONE.negate(), ONE }[v]);
    }
    tmpMYEQN.level(SEVEN);
    TestUtils.assertTrue(tmpExpModel.validate());
    final File tmpFile = new File(PATH + "testprob.mps");
    final MathProgSysModel tmpActModel = MathProgSysModel.make(tmpFile);
    TestUtils.assertTrue(tmpActModel.validate());
    final Result tmpExpMinRes = tmpExpModel.minimise();
    final Result tmpActMinRes = tmpActModel.minimise();
    TestUtils.assertEquals(tmpExpMinRes.getValue(), tmpActMinRes.getValue(), PRECISION);
    TestUtils.assertEquals(tmpVariables.length, tmpExpMinRes.count());
    TestUtils.assertEquals(tmpVariables.length, tmpActMinRes.count());
    TestUtils.assertEquals(tmpExpMinRes, tmpActMinRes, PRECISION);
    for (int i = 0; i < tmpVariables.length; i++) {
        TestUtils.assertEquals(tmpVariables[i].getName(), tmpExpMinRes.doubleValue(i), tmpActMinRes.doubleValue(i), PRECISION);
    }
    if (!tmpExpModel.validate(tmpExpMinRes, PRECISION)) {
        TestUtils.fail(SOLUTION_NOT_VALID);
    }
    if (!tmpActModel.validate(tmpActMinRes, PRECISION)) {
        TestUtils.fail(SOLUTION_NOT_VALID);
    }
    this.assertMinMaxVal(tmpActModel.getExpressionsBasedModel(), new BigDecimal("54"), new BigDecimal("80"));
}