Class SimpleUnivariateValueChecker

    • Constructor Detail

      • SimpleUnivariateValueChecker

        public SimpleUnivariateValueChecker​(double relativeThreshold,
                                            double absoluteThreshold)
        Build an instance with specified thresholds. In order to perform only relative checks, the absolute tolerance must be set to a negative value. In order to perform only absolute checks, the relative tolerance must be set to a negative value.
        Parameters:
        relativeThreshold - relative tolerance threshold
        absoluteThreshold - absolute tolerance threshold
      • SimpleUnivariateValueChecker

        public SimpleUnivariateValueChecker​(double relativeThreshold,
                                            double absoluteThreshold,
                                            int maxIter)
        Builds an instance with specified thresholds. In order to perform only relative checks, the absolute tolerance must be set to a negative value. In order to perform only absolute checks, the relative tolerance must be set to a negative value.
        Parameters:
        relativeThreshold - relative tolerance threshold
        absoluteThreshold - absolute tolerance threshold
        maxIter - Maximum iteration count.
        Throws:
        MathIllegalArgumentException - if maxIter <= 0.
    • Method Detail

      • converged

        public boolean converged​(int iteration,
                                 UnivariatePointValuePair previous,
                                 UnivariatePointValuePair current)
        Check if the optimization algorithm has converged considering the last two points. This method may be called several time from the same algorithm iteration with different points. This can be detected by checking the iteration number at each call if needed. Each time this method is called, the previous and current point correspond to points with the same role at each iteration, so they can be compared. As an example, simplex-based algorithms call this method for all points of the simplex, not only for the best or worst ones.
        Specified by:
        converged in interface ConvergenceChecker<UnivariatePointValuePair>
        Specified by:
        converged in class AbstractConvergenceChecker<UnivariatePointValuePair>
        Parameters:
        iteration - Index of current iteration
        previous - Best point in the previous iteration.
        current - Best point in the current iteration.
        Returns:
        true if the algorithm has converged.