org.apache.commons.math.ode.DerivativeException Java Examples
The following examples show how to use
org.apache.commons.math.ode.DerivativeException.
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Example #1
| Source File: DormandPrince853IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testKepler()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double scalAbsoluteTolerance = 1.0e-8;
double scalRelativeTolerance = scalAbsoluteTolerance;
FirstOrderIntegrator integ = new DormandPrince853Integrator(minStep, maxStep,
scalAbsoluteTolerance,
scalRelativeTolerance);
integ.setStepHandler(new KeplerHandler(pb));
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(pb.getCalls() < 2900);
}
Example #2
| Source File: DormandPrince54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void handleStep(StepInterpolator interpolator,
boolean isLast)
throws DerivativeException {
++nbSteps;
for (int a = 1; a < 10; ++a) {
double prev = interpolator.getPreviousTime();
double curr = interpolator.getCurrentTime();
double interp = ((10 - a) * prev + a * curr) / 10;
interpolator.setInterpolatedTime(interp);
double[] interpolatedY = interpolator.getInterpolatedState ();
double[] theoreticalY = pb.computeTheoreticalState(interpolator.getInterpolatedTime());
double dx = interpolatedY[0] - theoreticalY[0];
double dy = interpolatedY[1] - theoreticalY[1];
double error = dx * dx + dy * dy;
if (error > maxError) {
maxError = error;
}
}
if (isLast) {
assertTrue(maxError < 7.0e-10);
assertTrue(nbSteps < 400);
}
}
Example #3
| Source File: DormandPrince54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testKepler()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double scalAbsoluteTolerance = 1.0e-8;
double scalRelativeTolerance = scalAbsoluteTolerance;
FirstOrderIntegrator integ = new DormandPrince54Integrator(minStep, maxStep,
scalAbsoluteTolerance,
scalRelativeTolerance);
integ.setStepHandler(new KeplerHandler(pb));
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(pb.getCalls() < 2800);
}
Example #4
| Source File: DormandPrince54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testVariableSteps()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double scalAbsoluteTolerance = 1.0e-8;
double scalRelativeTolerance = scalAbsoluteTolerance;
FirstOrderIntegrator integ = new DormandPrince54Integrator(minStep, maxStep,
scalAbsoluteTolerance,
scalRelativeTolerance);
integ.setStepHandler(new VariableHandler());
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
}
Example #5
| Source File: DormandPrince54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testSmallLastStep()
throws DerivativeException, IntegratorException {
TestProblemAbstract pb = new TestProblem5();
double minStep = 1.25;
double maxStep = Math.abs(pb.getFinalTime() - pb.getInitialTime());
double scalAbsoluteTolerance = 6.0e-4;
double scalRelativeTolerance = 6.0e-4;
AdaptiveStepsizeIntegrator integ =
new DormandPrince54Integrator(minStep, maxStep,
scalAbsoluteTolerance,
scalRelativeTolerance);
DP54SmallLastHandler handler = new DP54SmallLastHandler(minStep);
integ.setStepHandler(handler);
integ.setInitialStepSize(1.7);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.wasLastSeen());
assertEquals("Dormand-Prince 5(4)", integ.getName());
}
Example #6
| Source File: DormandPrince54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testMinStep()
throws DerivativeException, IntegratorException {
try {
TestProblem1 pb = new TestProblem1();
double minStep = 0.1 * (pb.getFinalTime() - pb.getInitialTime());
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double[] vecAbsoluteTolerance = { 1.0e-15, 1.0e-16 };
double[] vecRelativeTolerance = { 1.0e-15, 1.0e-16 };
FirstOrderIntegrator integ = new DormandPrince54Integrator(minStep, maxStep,
vecAbsoluteTolerance,
vecRelativeTolerance);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
fail("an exception should have been thrown");
} catch(DerivativeException de) {
fail("wrong exception caught");
} catch(IntegratorException ie) {
}
}
Example #7
| Source File: GillIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testSmallStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.001;
FirstOrderIntegrator integ = new GillIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb, pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() < 2.0e-13);
assertTrue(handler.getMaximalValueError() < 4.0e-12);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
assertEquals("Gill", integ.getName());
}
Example #8
| Source File: GillIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testBigStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.2;
FirstOrderIntegrator integ = new GillIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb, pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() > 0.0004);
assertTrue(handler.getMaximalValueError() > 0.005);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
}
Example #9
| Source File: FirstOrderConverterTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testDecreasingSteps()
throws DerivativeException, IntegratorException {
double previousError = Double.NaN;
for (int i = 0; i < 10; ++i) {
double step = Math.pow(2.0, -(i + 1));
double error = integrateWithSpecifiedStep(4.0, 0.0, 1.0, step)
- Math.sin(4.0);
if (i > 0) {
assertTrue(Math.abs(error) < Math.abs(previousError));
}
previousError = error;
}
}
Example #10
| Source File: GraggBulirschStoerIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void handleStep(StepInterpolator interpolator,
boolean isLast)
throws DerivativeException {
++nbSteps;
for (int a = 1; a < 100; ++a) {
double prev = interpolator.getPreviousTime();
double curr = interpolator.getCurrentTime();
double interp = ((100 - a) * prev + a * curr) / 100;
interpolator.setInterpolatedTime(interp);
double[] interpolatedY = interpolator.getInterpolatedState ();
double[] theoreticalY = pb.computeTheoreticalState(interpolator.getInterpolatedTime());
double dx = interpolatedY[0] - theoreticalY[0];
double dy = interpolatedY[1] - theoreticalY[1];
double error = dx * dx + dy * dy;
if (error > maxError) {
maxError = error;
}
}
if (isLast) {
assertTrue(maxError < 2.7e-6);
assertTrue(nbSteps < 80);
}
}
Example #11
| Source File: GraggBulirschStoerIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testVariableSteps()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double absTolerance = 1.0e-8;
double relTolerance = 1.0e-8;
FirstOrderIntegrator integ =
new GraggBulirschStoerIntegrator(minStep, maxStep,
absTolerance, relTolerance);
integ.setStepHandler(new VariableStepHandler());
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertEquals("Gragg-Bulirsch-Stoer", integ.getName());
}
Example #12
| Source File: GraggBulirschStoerIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testKepler()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double absTolerance = 1.0e-6;
double relTolerance = 1.0e-6;
FirstOrderIntegrator integ =
new GraggBulirschStoerIntegrator(minStep, maxStep,
absTolerance, relTolerance);
integ.setStepHandler(new KeplerStepHandler(pb));
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(pb.getCalls() < 2150);
}
Example #13
| Source File: MidpointIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testSmallStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.001;
FirstOrderIntegrator integ = new MidpointIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() < 2.0e-7);
assertTrue(handler.getMaximalValueError() < 1.0e-6);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
assertEquals("midpoint", integ.getName());
}
Example #14
| Source File: MidpointIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testBigStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.2;
FirstOrderIntegrator integ = new MidpointIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() > 0.01);
assertTrue(handler.getMaximalValueError() > 0.05);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
}
Example #15
| Source File: StepNormalizerTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testBeforeEnd()
throws DerivativeException, IntegratorException {
final double range = pb.getFinalTime() - pb.getInitialTime();
setLastSeen(false);
integ.setStepHandler(new StepNormalizer(range / 10.5,
new FixedStepHandler() {
public void handleStep(double t,
double[] y,
boolean isLast) {
if (isLast) {
setLastSeen(true);
checkValue(t,
pb.getFinalTime() - range / 21.0);
}
}
}));
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(lastSeen);
}
Example #16
| Source File: ThreeEighthesIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testSmallStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.001;
FirstOrderIntegrator integ = new ThreeEighthesIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb, pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() < 2.0e-13);
assertTrue(handler.getMaximalValueError() < 4.0e-12);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
assertEquals("3/8", integ.getName());
}
Example #17
| Source File: EulerIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testBigStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.2;
FirstOrderIntegrator integ = new EulerIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() > 0.01);
assertTrue(handler.getMaximalValueError() > 0.2);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
}
Example #18
| Source File: HighamHall54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testKepler()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double[] vecAbsoluteTolerance = { 1.0e-8, 1.0e-8, 1.0e-10, 1.0e-10 };
double[] vecRelativeTolerance = { 1.0e-10, 1.0e-10, 1.0e-8, 1.0e-8 };
FirstOrderIntegrator integ = new HighamHall54Integrator(minStep, maxStep,
vecAbsoluteTolerance,
vecRelativeTolerance);
integ.setStepHandler(new KeplerHandler(pb));
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertEquals("Higham-Hall 5(4)", integ.getName());
}
Example #19
| Source File: EulerIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testSmallStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.001;
FirstOrderIntegrator integ = new EulerIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() < 2.0e-4);
assertTrue(handler.getMaximalValueError() < 1.0e-3);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
assertEquals("Euler", integ.getName());
}
Example #20
| Source File: EulerStepInterpolatorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testInterpolationInside()
throws DerivativeException {
double[] y = { 1.0, 3.0, -4.0 };
double[][] yDot = { { 1.0, 2.0, -2.0 } };
EulerStepInterpolator interpolator = new EulerStepInterpolator();
interpolator.reinitialize(new DummyEquations(), y, yDot, true);
interpolator.storeTime(0);
interpolator.shift();
interpolator.storeTime(1);
interpolator.setInterpolatedTime(0.1);
double[] result = interpolator.getInterpolatedState();
assertTrue(Math.abs(result[0] - 0.1) < 1.0e-10);
assertTrue(Math.abs(result[1] - 1.2) < 1.0e-10);
assertTrue(Math.abs(result[2] + 2.2) < 1.0e-10);
interpolator.setInterpolatedTime(0.5);
result = interpolator.getInterpolatedState();
assertTrue(Math.abs(result[0] - 0.5) < 1.0e-10);
assertTrue(Math.abs(result[1] - 2.0) < 1.0e-10);
assertTrue(Math.abs(result[2] + 3.0) < 1.0e-10);
}
Example #21
| Source File: HighamHall54IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testMinStep()
throws DerivativeException, IntegratorException {
try {
TestProblem1 pb = new TestProblem1();
double minStep = 0.1 * (pb.getFinalTime() - pb.getInitialTime());
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double[] vecAbsoluteTolerance = { 1.0e-15, 1.0e-16 };
double[] vecRelativeTolerance = { 1.0e-15, 1.0e-16 };
FirstOrderIntegrator integ = new HighamHall54Integrator(minStep, maxStep,
vecAbsoluteTolerance,
vecRelativeTolerance);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
fail("an exception should have been thrown");
} catch(DerivativeException de) {
fail("wrong exception caught");
} catch(IntegratorException ie) {
}
}
Example #22
| Source File: ClassicalRungeKuttaIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testSmallStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.001;
FirstOrderIntegrator integ = new ClassicalRungeKuttaIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb, pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() < 2.0e-13);
assertTrue(handler.getMaximalValueError() < 4.0e-12);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
assertEquals("classical Runge-Kutta", integ.getName());
}
Example #23
| Source File: ClassicalRungeKuttaIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testBigStep()
throws DerivativeException, IntegratorException {
TestProblem1 pb = new TestProblem1();
double step = (pb.getFinalTime() - pb.getInitialTime()) * 0.2;
FirstOrderIntegrator integ = new ClassicalRungeKuttaIntegrator(step);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb, pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(handler.getLastError() > 0.0004);
assertTrue(handler.getMaximalValueError() > 0.005);
assertEquals(0, handler.getMaximalTimeError(), 1.0e-12);
}
Example #24
| Source File: DormandPrince853IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void handleStep(StepInterpolator interpolator,
boolean isLast)
throws DerivativeException {
++nbSteps;
for (int a = 1; a < 10; ++a) {
double prev = interpolator.getPreviousTime();
double curr = interpolator.getCurrentTime();
double interp = ((10 - a) * prev + a * curr) / 10;
interpolator.setInterpolatedTime(interp);
double[] interpolatedY = interpolator.getInterpolatedState ();
double[] theoreticalY = pb.computeTheoreticalState(interpolator.getInterpolatedTime());
double dx = interpolatedY[0] - theoreticalY[0];
double dy = interpolatedY[1] - theoreticalY[1];
double error = dx * dx + dy * dy;
if (error > maxError) {
maxError = error;
}
}
if (isLast) {
assertTrue(maxError < 2.4e-10);
assertTrue(nbSteps < 150);
}
}
Example #25
| Source File: DormandPrince853IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testMinStep()
throws DerivativeException, IntegratorException {
try {
TestProblem1 pb = new TestProblem1();
double minStep = 0.1 * (pb.getFinalTime() - pb.getInitialTime());
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double[] vecAbsoluteTolerance = { 1.0e-15, 1.0e-16 };
double[] vecRelativeTolerance = { 1.0e-15, 1.0e-16 };
FirstOrderIntegrator integ = new DormandPrince853Integrator(minStep, maxStep,
vecAbsoluteTolerance,
vecRelativeTolerance);
TestProblemHandler handler = new TestProblemHandler(pb, integ);
integ.setStepHandler(handler);
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
fail("an exception should have been thrown");
} catch(DerivativeException de) {
fail("wrong exception caught");
} catch(IntegratorException ie) {
}
}
Example #26
| Source File: DormandPrince853IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testVariableSteps()
throws DerivativeException, IntegratorException {
final TestProblem3 pb = new TestProblem3(0.9);
double minStep = 0;
double maxStep = pb.getFinalTime() - pb.getInitialTime();
double scalAbsoluteTolerance = 1.0e-8;
double scalRelativeTolerance = scalAbsoluteTolerance;
FirstOrderIntegrator integ = new DormandPrince853Integrator(minStep, maxStep,
scalAbsoluteTolerance,
scalRelativeTolerance);
integ.setStepHandler(new VariableHandler());
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertEquals("Dormand-Prince 8 (5, 3)", integ.getName());
}
Example #27
| Source File: StepNormalizerTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 6 votes |
|
public void testBoundaries()
throws DerivativeException, IntegratorException {
double range = pb.getFinalTime() - pb.getInitialTime();
setLastSeen(false);
integ.setStepHandler(new StepNormalizer(range / 10.0,
new FixedStepHandler() {
private boolean firstCall = true;
public void handleStep(double t,
double[] y,
boolean isLast) {
if (firstCall) {
checkValue(t, pb.getInitialTime());
firstCall = false;
}
if (isLast) {
setLastSeen(true);
checkValue(t, pb.getFinalTime());
}
}
}));
integ.integrate(pb,
pb.getInitialTime(), pb.getInitialState(),
pb.getFinalTime(), new double[pb.getDimension()]);
assertTrue(lastSeen);
}
Example #28
| Source File: DormandPrince853IntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 5 votes |
|
public void handleStep(StepInterpolator interpolator,
boolean isLast)
throws DerivativeException {
double prev = interpolator.getPreviousTime();
double curr = interpolator.getCurrentTime();
interpolator.setInterpolatedTime(0.5*(prev + curr));
}
Example #29
| Source File: GillIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 5 votes |
|
public void testUnstableDerivative()
throws DerivativeException, IntegratorException {
final StepProblem stepProblem = new StepProblem(0.0, 1.0, 2.0);
FirstOrderIntegrator integ = new GillIntegrator(0.3);
integ.addSwitchingFunction(stepProblem, 1.0, 1.0e-12, 1000);
double[] y = { Double.NaN };
integ.integrate(stepProblem, 0.0, new double[] { 0.0 }, 10.0, y);
assertEquals(8.0, y[0], 1.0e-12);
}
Example #30
| Source File: GraggBulirschStoerIntegratorTest.java From cacheonix-core with GNU Lesser General Public License v2.1 | 5 votes |
|
public void testUnstableDerivative()
throws DerivativeException, IntegratorException {
final StepProblem stepProblem = new StepProblem(0.0, 1.0, 2.0);
FirstOrderIntegrator integ =
new GraggBulirschStoerIntegrator(0.1, 10, 1.0e-12, 0.0);
integ.addSwitchingFunction(stepProblem, 1.0, 1.0e-12, 1000);
double[] y = { Double.NaN };
integ.integrate(stepProblem, 0.0, new double[] { 0.0 }, 10.0, y);
assertEquals(8.0, y[0], 1.0e-12);
}
