Package org.ssclab.pl.milp

Interface Variable

public interface Variable

This interface allows accessing the optimal value assumed by the j-th variable of the LP problem (j=1..N). In addition to the optimal value, it is possible to retrieve other characteristics.

Version:

1.0

Author:

Stefano Scarioli

See Also:

SSC Software www.sscLab.org

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	Variable.TYPE_VAR	Defines the type of variable: integer, binary, or real.

Method Summary

Modifier and Type	Method	Description
double	getLower()	Retrieves its lower bound.
java.lang.String	getName()	Retrieves the name of the variable.
Variable.TYPE_VAR	getType()	Retrieves the type of variable (integer, binary, real).
double	getUpper()	Retrieves its upper bound if set (by default it is + ∞)
double	getValue()	Retrieves the optimal value assumed by the variable within the determined optimal solution.
boolean	isFree()	Retrieves true if the variable is free.

Method Detail

getName

java.lang.String getName()

Retrieves the name of the variable.

Returns:

The name of variable

getType

Variable.TYPE_VAR getType()

Retrieves the type of variable (integer, binary, real).

Returns:

The type of variable

getUpper

double getUpper()

Retrieves its upper bound if set (by default it is + ∞)

Returns:

The upper bound of variable

getLower

double getLower()

Retrieves its lower bound.

Returns:

The lower bound of variable

isFree

boolean isFree()

Retrieves true if the variable is free. To make a variable free, it must have been defined for the variable either a negative upper bound, or a negative lower bound, or indefinite (- ∞).

Returns:

True if the variable is free.

getValue

double getValue()

Retrieves the optimal value assumed by the variable within the determined optimal solution.

Returns:

The optimal value assumed by the variable within the determined optimal solution.