Class BracketFinder


  • public class BracketFinder
    extends Object
    Provide an interval that brackets a local optimum of a function. This code is based on a Python implementation (from SciPy, module optimize.py v0.5).
    • Constructor Detail

      • BracketFinder

        public BracketFinder()
        Constructor with default values 100, 500 (see the other constructor).
      • BracketFinder

        public BracketFinder​(double growLimit,
                             int maxEvaluations)
        Create a bracketing interval finder.
        Parameters:
        growLimit - Expanding factor.
        maxEvaluations - Maximum number of evaluations allowed for finding a bracketing interval.
    • Method Detail

      • search

        public void search​(UnivariateFunction func,
                           GoalType goal,
                           double xA,
                           double xB)
        Search new points that bracket a local optimum of the function.
        Parameters:
        func - Function whose optimum should be bracketed.
        goal - Goal type.
        xA - Initial point.
        xB - Initial point.
        Throws:
        MathIllegalStateException - if the maximum number of evaluations is exceeded.
      • getMaxEvaluations

        public int getMaxEvaluations()
        Get maximum number of evaluations.
        Returns:
        the maximum number of evaluations
      • getEvaluations

        public int getEvaluations()
        Get number of evaluations.
        Returns:
        the number of evaluations
      • getLo

        public double getLo()
        Get lower bound of the bracket.
        Returns:
        the lower bound of the bracket
        See Also:
        getFLo()
      • getFLo

        public double getFLo()
        Get function value at getLo().
        Returns:
        function value at getLo()
      • getHi

        public double getHi()
        Get higher bound of the bracket.
        Returns:
        the higher bound of the bracket
        See Also:
        getFHi()
      • getFHi

        public double getFHi()
        Get function value at getHi().
        Returns:
        function value at getHi()
      • getMid

        public double getMid()
        Get a point in the middle of the bracket.
        Returns:
        a point in the middle of the bracket
        See Also:
        getFMid()
      • getFMid

        public double getFMid()
        Get function value at getMid().
        Returns:
        function value at getMid()