org.apache.commons.math3.optimization.linear

Interface LinearOptimizer

• All Known Implementing Classes:
AbstractLinearOptimizer, SimplexSolver

Deprecated.
As of 3.1 (to be removed in 4.0).

@Deprecated
public interface LinearOptimizer
This interface represents an optimization algorithm for linear problems.

Optimization algorithms find the input point set that either maximize or minimize an objective function. In the linear case the form of the function is restricted to

 c1x1 + ... cnxn = v

and there may be linear constraints too, of one of the forms:
• c1x1 + ... cnxn = v
• c1x1 + ... cnxn <= v
• c1x1 + ... cnxn >= v
• l1x1 + ... lnxn + lcst = r1x1 + ... rnxn + rcst
• l1x1 + ... lnxn + lcst <= r1x1 + ... rnxn + rcst
• l1x1 + ... lnxn + lcst >= r1x1 + ... rnxn + rcst
where the ci, li or ri are the coefficients of the constraints, the xi are the coordinates of the current point and v is the value of the constraint.

Since:
2.0
• Method Summary

Methods
Modifier and Type Method and Description
int getIterations()
Deprecated.
Get the number of iterations realized by the algorithm.
int getMaxIterations()
Deprecated.
Get the maximal number of iterations of the algorithm.
PointValuePair optimize(LinearObjectiveFunction f, Collection<LinearConstraint> constraints, GoalType goalType, boolean restrictToNonNegative)
Deprecated.
Optimizes an objective function.
void setMaxIterations(int maxIterations)
Deprecated.
Set the maximal number of iterations of the algorithm.
• Method Detail

• setMaxIterations

void setMaxIterations(int maxIterations)
Deprecated.
Set the maximal number of iterations of the algorithm.
Parameters:
maxIterations - maximal number of function calls
• getMaxIterations

int getMaxIterations()
Deprecated.
Get the maximal number of iterations of the algorithm.
Returns:
maximal number of iterations
• getIterations

int getIterations()
Deprecated.
Get the number of iterations realized by the algorithm.

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

Returns:
number of iterations
• optimize

PointValuePair optimize(LinearObjectiveFunction f,
Collection<LinearConstraint> constraints,
GoalType goalType,
boolean restrictToNonNegative)
throws MathIllegalStateException
Deprecated.
Optimizes an objective function.
Parameters:
f - linear objective function
constraints - linear constraints
goalType - type of optimization goal: either GoalType.MAXIMIZE or GoalType.MINIMIZE
restrictToNonNegative - whether to restrict the variables to non-negative values
Returns:
point/value pair giving the optimal value for objective function
Throws:
MathIllegalStateException - if no solution fulfilling the constraints can be found in the allowed number of iterations