org.apache.commons.math3.optim.nonlinear.vector

Class MultiStartMultivariateVectorOptimizer

java.lang.Object

org.apache.commons.math3.optim.BaseOptimizer<PAIR>

org.apache.commons.math3.optim.BaseMultivariateOptimizer<PAIR>

org.apache.commons.math3.optim.BaseMultiStartMultivariateOptimizer<PointVectorValuePair>

org.apache.commons.math3.optim.nonlinear.vector.MultiStartMultivariateVectorOptimizer

Deprecated.

@Deprecated
public class MultiStartMultivariateVectorOptimizer
extends BaseMultiStartMultivariateOptimizer<PointVectorValuePair>

Multi-start optimizer for a (vector) model function. This class wraps an optimizer in order to use it several times in turn with different starting points (trying to avoid being trapped in a local extremum when looking for a global one).

Since:

3.0

Constructor Summary

Constructors

Constructor and Description
MultiStartMultivariateVectorOptimizer(MultivariateVectorOptimizer optimizer, int starts, RandomVectorGenerator generator) Deprecated. Create a multi-start optimizer from a single-start optimizer.

Method Summary

Modifier and Type	Method and Description
PointVectorValuePair[]	getOptima() Deprecated. Gets all the optima found during the last call to optimize.

Methods inherited from class org.apache.commons.math3.optim.BaseMultiStartMultivariateOptimizer

getEvaluations, optimize

Methods inherited from class org.apache.commons.math3.optim.BaseMultivariateOptimizer

getLowerBound, getStartPoint, getUpperBound

Methods inherited from class org.apache.commons.math3.optim.BaseOptimizer

getConvergenceChecker, getIterations, getMaxEvaluations, getMaxIterations, optimize

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiStartMultivariateVectorOptimizer

public MultiStartMultivariateVectorOptimizer(MultivariateVectorOptimizer optimizer,
                                             int starts,
                                             RandomVectorGenerator generator)
                                      throws NullArgumentException,
                                             NotStrictlyPositiveException

Deprecated.

Create a multi-start optimizer from a single-start optimizer.

Parameters:

optimizer - Single-start optimizer to wrap.

starts - Number of starts to perform. If starts == 1, the result will be same as if optimizer is called directly.

generator - Random vector generator to use for restarts.

Throws:

NullArgumentException - if optimizer or generator is null.

NotStrictlyPositiveException - if starts < 1.

Method Detail

getOptima

public PointVectorValuePair[] getOptima()

Deprecated.

Gets 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 null elements corresponding to the runs that did not converge. This means all elements will be null if the optimize method did throw an exception. This also means that if the first element is not null, it is the best point found across all starts.
The behaviour is undefined if this method is called before optimize; it will likely throw NullPointerException.

Specified by:

getOptima in class BaseMultiStartMultivariateOptimizer<PointVectorValuePair>

Returns:

an array containing the optima sorted from best to worst.