org.apache.commons.math3.optim.univariate
Class UnivariateOptimizer

java.lang.Object
  org.apache.commons.math3.optim.BaseOptimizer<UnivariatePointValuePair>
      org.apache.commons.math3.optim.univariate.UnivariateOptimizer

Direct Known Subclasses:

BrentOptimizer, MultiStartUnivariateOptimizer

public abstract class UnivariateOptimizer
extends BaseOptimizer<UnivariatePointValuePair>

Base class for a univariate scalar function optimizer.

Since:

3.1

Version:

$Id: UnivariateOptimizer.java 7721 2013-02-14 14:07:13Z CardosoP $

Field Summary

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

evaluations, iterations

Constructor Summary

protected

UnivariateOptimizer(ConvergenceChecker<UnivariatePointValuePair> checker)

Method Summary

protected double	computeObjectiveValue(double x) Computes the objective function value.
GoalType	getGoalType()
double	getMax()
double	getMin()
double	getStartValue()
UnivariatePointValuePair	optimize(OptimizationData... optData) Stores data and performs the optimization.

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

doOptimize, getConvergenceChecker, getEvaluations, getIterations, getMaxEvaluations, getMaxIterations, incrementEvaluationCount, incrementIterationCount

Methods inherited from class java.lang.Object

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

Constructor Detail

UnivariateOptimizer

protected UnivariateOptimizer(ConvergenceChecker<UnivariatePointValuePair> checker)

Parameters:

checker - Convergence checker.

Method Detail

optimize

public UnivariatePointValuePair optimize(OptimizationData... optData)
                                  throws TooManyEvaluationsException

Stores data and performs the optimization.
The list of parameters is open-ended so that sub-classes can extend it with arguments specific to their concrete implementations.
When the method is called multiple times, instance data is overwritten only when actually present in the list of arguments: when not specified, data set in a previous call is retained (and thus is optional in subsequent calls).

Overrides:

optimize in class BaseOptimizer<UnivariatePointValuePair>

Parameters:

optData - Optimization data. The following data will be looked for:

• GoalType
• SearchInterval
• UnivariateObjectiveFunction

Returns:

a point/value pair that satifies the convergence criteria.

Throws:

TooManyEvaluationsException - if the maximal number of evaluations is exceeded.

getGoalType

public GoalType getGoalType()

Returns:

the optimization type.

getStartValue

public double getStartValue()

Returns:

the initial guess.

getMin

public double getMin()

Returns:

the lower bounds.

getMax

public double getMax()

Returns:

the upper bounds.

computeObjectiveValue

protected double computeObjectiveValue(double x)

Computes the objective function value. This method must be called by subclasses to enforce the evaluation counter limit.

Parameters:

x - Point at which the objective function must be evaluated.

Returns:

the objective function value at the specified point.

Throws:

TooManyEvaluationsException - if the maximal number of evaluations is exceeded.