Examples of umontreal.iro.lecuyer.functions.MathFunction

umontreal.iro.lecuyer.functions.MathFunction
This interface should be implemented by classes which represent univariate mathematical functions. It is used to pass an arbitrary function of one variable as argument to another function. For example, it is used in {@link umontreal.iro.lecuyer.util.RootFinder RootFinder} to findthe zeros of a function.

      return retour;
   }




   private static double evaluateX (final MathFunction spline, final double y, double xPrincipal, double xAnnexe) {
      final MathFunction xFunction = new MathFunction () {
         public double evaluate (double t) {
            return spline.evaluate(t) - y;
         }
      };
      return RootFinder.brentDekker (xPrincipal, xAnnexe-1.0E-6, xFunction, 1e-6);

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      }
      return bs;
   }


   public double evaluate(final double u) {
      final MathFunction xFunction = new MathFunction () {
         public double evaluate (double t) {
            return evalX(t) - u;
         }
      };
      final double t = RootFinder.brentDekker (0, 1-1.0E-6, xFunction, 1e-6);

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         throw new IllegalArgumentException ("u not in [0,1]");
      if (u <= 0.0) return 0.0;
      if (u >= 1.0)
         return Double.POSITIVE_INFINITY;


      MathFunction f = new FunctionInverse (mu, sigma, u);
      return RootFinder.brentDekker (0.0, mu + 10.0*sigma, f, 1.0e-14);
   }

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umontreal.iro.lecuyer.functionfit.BSpline

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