Package org.apache.commons.math.ode

Examples of org.apache.commons.math.ode.FirstOrderDifferentialEquations


  public void testMissedEndEvent() throws IntegratorException, DerivativeException {
      final double   t0     = 1878250320.0000029;
      final double   tEvent = 1878250379.9999986;
      final double[] k  = { 1.0e-4, 1.0e-5, 1.0e-6 };
      FirstOrderDifferentialEquations ode = new FirstOrderDifferentialEquations() {

          public int getDimension() {
              return k.length;
          }
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              return false;
          }
          public void reset() {
          }
      });
      integ.integrate(new FirstOrderDifferentialEquations() {
          private static final long serialVersionUID = 0L;
          public void computeDerivatives(double t, double[] y, double[] dot) {
              dot[0] = 1.0;
          }
          public int getDimension() {
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              return false;
          }
          public void reset() {
          }
      });
      integ.integrate(new FirstOrderDifferentialEquations() {
          private static final long serialVersionUID = 0L;
          public void computeDerivatives(double t, double[] y, double[] dot) {
              dot[0] = 1.0;
          }
          public int getDimension() {
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  public void testMissedEndEvent() throws IntegratorException, DerivativeException {
      final double   t0     = 1878250320.0000029;
      final double   tEvent = 1878250379.9999986;
      final double[] k      = { 1.0e-4, 1.0e-5, 1.0e-6 };
      FirstOrderDifferentialEquations ode = new FirstOrderDifferentialEquations() {

          public int getDimension() {
              return k.length;
          }
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              return false;
          }
          public void reset() {
          }
      });
      integ.integrate(new FirstOrderDifferentialEquations() {
          private static final long serialVersionUID = 0L;
          public void computeDerivatives(double t, double[] y, double[] dot) {
              dot[0] = 1.0;
          }
          public int getDimension() {
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              return false;
          }
          public void reset() {
          }
      });
      integ.integrate(new FirstOrderDifferentialEquations() {
          public void computeDerivatives(double t, double[] y, double[] dot) {
              dot[0] = 1.0;
          }
          public int getDimension() {
              return 1;
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  public void testWrongDerivative() {
    try {
      HighamHall54Integrator integrator =
          new HighamHall54Integrator(0.0, 1.0, 1.0e-10, 1.0e-10);
      FirstOrderDifferentialEquations equations =
          new FirstOrderDifferentialEquations() {
            private static final long serialVersionUID = -1157081786301178032L;
            public void computeDerivatives(double t, double[] y, double[] dot)
            throws DerivativeException {
            if (t < -0.5) {
                throw new DerivativeException("{0}", "oops");
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            return false;
        }
        public void reset() {
        }
      });
      integ.integrate(new FirstOrderDifferentialEquations() {
                          private static final long serialVersionUID = 0L;
                          public void computeDerivatives(double t, double[] y, double[] dot) {
                              dot[0] = 1.0;
                          }
                          public int getDimension() {
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  }

  public void testWrongDerivative() throws Exception {
      HighamHall54Integrator integrator =
          new HighamHall54Integrator(0.0, 1.0, 1.0e-10, 1.0e-10);
      FirstOrderDifferentialEquations equations =
          new FirstOrderDifferentialEquations() {
            private static final long serialVersionUID = -1157081786301178032L;
            public void computeDerivatives(double t, double[] y, double[] dot)
            throws DerivativeException {
            if (t < -0.5) {
                throw new DerivativeException(LocalizedFormats.SIMPLE_MESSAGE, "oops");
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              return false;
          }
          public void reset() {
          }
      });
      integ.integrate(new FirstOrderDifferentialEquations() {
          private static final long serialVersionUID = 0L;
          public void computeDerivatives(double t, double[] y, double[] dot) {
              dot[0] = 1.0;
          }
          public int getDimension() {
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