Class MultiStartDifferentiableMultivariateVectorialOptimizer

    • Constructor Detail

      • MultiStartDifferentiableMultivariateVectorialOptimizer

        public MultiStartDifferentiableMultivariateVectorialOptimizer​(DifferentiableMultivariateVectorialOptimizer optimizer,
                                                                      int starts,
                                                                      RandomVectorGenerator generator)
        Create a multi-start optimizer from a single-start optimizer
        Parameters:
        optimizer - single-start optimizer to wrap
        starts - number of starts to perform (including the first one), multi-start is disabled if value is less than or equal to 1
        generator - random vector generator to use for restarts
    • Method Detail

      • getOptima

        public VectorialPointValuePair[] getOptima()
                                            throws java.lang.IllegalStateException
        Get all the optima found during the last call to optimize.

        The optimizer stores all the optima found during a set of restarts. The optimize method returns the best point only. This method returns all the points found at the end of each starts, including the best one already returned by the optimize method.

        The returned array as one element for each start as specified in the constructor. It is ordered with the results from the runs that did converge first, sorted from best to worst objective value (i.e in ascending order if minimizing and in descending order if maximizing), followed by and null elements corresponding to the runs that did not converge. This means all elements will be null if the optimize method did throw a ConvergenceException). This also means that if the first element is non null, it is the best point found across all starts.

        Returns:
        array containing the optima
        Throws:
        java.lang.IllegalStateException - if optimize has not been called
      • getEvaluations

        public int getEvaluations()
        Get the number of evaluations of the objective function.

        The number of evaluation correspond to the last call to the optimize method. It is 0 if the method has not been called yet.

        Specified by:
        getEvaluations in interface DifferentiableMultivariateVectorialOptimizer
        Returns:
        number of evaluations of the objective function
      • getJacobianEvaluations

        public int getJacobianEvaluations()
        Get the number of evaluations of the objective function jacobian .

        The number of evaluation correspond to the last call to the optimize method. It is 0 if the method has not been called yet.

        Specified by:
        getJacobianEvaluations in interface DifferentiableMultivariateVectorialOptimizer
        Returns:
        number of evaluations of the objective function jacobian