com.numericalmethod.suanshu.optimization.constrained.constraint.linear

Class LinearConstraints

java.lang.Object

com.numericalmethod.suanshu.optimization.constrained.constraint.linear.LinearConstraints

All Implemented Interfaces:

Constraints, java.io.Serializable

Direct Known Subclasses:

LinearEqualityConstraints, LinearGreaterThanConstraints, LinearLessThanConstraints

public abstract class LinearConstraints
extends java.lang.Object
implements Constraints

This is a collection of linear constraints for a real-valued optimization problem.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LinearConstraints(Matrix A, Vector b) Construct a collection of linear constraints.

Method Summary

Modifier and Type	Method and Description
ImmutableMatrix	A() Get the constraint coefficients.
ImmutableVector	b() Get the constraint values.
static LinearConstraints	concat(LinearConstraints... groups) Concatenate collections of linear constraints into one collection.
int	dimension() Get the number of variables.
Matrix	getActiveConstraints(Vector x, double epsilon) Get the active constraint.
java.util.ArrayList<java.lang.Integer>	getActiveRows(Vector x, double epsilon) Get the active constraint indices.
java.util.ArrayList<RealScalarFunction>	getConstraints() Get the list of constraint functions.
int	size() Get the number of constraints.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearConstraints

public LinearConstraints(Matrix A,
                         Vector b)

Construct a collection of linear constraints.

Parameters:

A - the constraint coefficients

b - the constraint values

Method Detail

getConstraints

public java.util.ArrayList<RealScalarFunction> getConstraints()

Description copied from interface: Constraints

Get the list of constraint functions.

Specified by:

getConstraints in interface Constraints

Returns:

the list of constraint functions

dimension

public int dimension()

Description copied from interface: Constraints

Get the number of variables.

Specified by:

dimension in interface Constraints

Returns:

the number of variables

size

public int size()

Description copied from interface: Constraints

Get the number of constraints.

Specified by:

size in interface Constraints

Returns:

the number of constraints

A

public ImmutableMatrix A()

Get the constraint coefficients.

Returns:

the constraint coefficients

b

public ImmutableVector b()

Get the constraint values.

Returns:

the constraint values

getActiveRows

public java.util.ArrayList<java.lang.Integer> getActiveRows(Vector x,
                                                            double epsilon)

Get the active constraint indices. The active constraints are those with a_i(x) = 0.

Parameters:

x - a point or a potential solution

epsilon - a precision parameter: when a number |x| ≤ ε, it is considered 0

Returns:

the active (row) indices

getActiveConstraints

public Matrix getActiveConstraints(Vector x,
                                   double epsilon)

Get the active constraint. The active constraints are those with a_i(x) = 0.

Parameters:

x - a point or a potential solution

epsilon - a precision parameter: when a number |x| ≤ ε, it is considered 0

Returns:

the active constraints

concat

public static LinearConstraints concat(LinearConstraints... groups)

Concatenate collections of linear constraints into one collection.

Parameters:

groups - collections of linear constraints

Returns:

a collection of linear constraints

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object