org.apache.commons.math.optimization.linear
Class LinearObjectiveFunction

java.lang.Object
  org.apache.commons.math.optimization.linear.LinearObjectiveFunction

All Implemented Interfaces:

Serializable

public class LinearObjectiveFunction
extends Object
implements Serializable

An objective function for a linear optimization problem.

A linear objective function has one the form:

 c1x1 + ... cnxn + d
 

The c_i and d are the coefficients of the equation, the x_i are the coordinates of the current point.

Since:

2.0

Version:

$Revision: 922713 $ $Date: 2010-03-14 02:26:13 +0100 (dim. 14 mars 2010) $

See Also:

Serialized Form

Constructor Summary

LinearObjectiveFunction(double[] coefficients, double constantTerm)

LinearObjectiveFunction(RealVector coefficients, double constantTerm)

Method Summary

boolean	equals(Object other)
RealVector	getCoefficients() Get the coefficients of the linear equation being optimized.
double	getConstantTerm() Get the constant of the linear equation being optimized.
double	getValue(double[] point) Compute the value of the linear equation at the current point
double	getValue(RealVector point) Compute the value of the linear equation at the current point
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearObjectiveFunction

public LinearObjectiveFunction(double[] coefficients,
                               double constantTerm)

Parameters:

coefficients - The coefficients for the linear equation being optimized

constantTerm - The constant term of the linear equation

LinearObjectiveFunction

public LinearObjectiveFunction(RealVector coefficients,
                               double constantTerm)

Parameters:

coefficients - The coefficients for the linear equation being optimized

constantTerm - The constant term of the linear equation

Method Detail

getCoefficients

public RealVector getCoefficients()

Get the coefficients of the linear equation being optimized.

Returns:

coefficients of the linear equation being optimized

getConstantTerm

public double getConstantTerm()

Get the constant of the linear equation being optimized.

Returns:

constant of the linear equation being optimized

getValue

public double getValue(double[] point)

Compute the value of the linear equation at the current point

Parameters:

point - point at which linear equation must be evaluated

Returns:

value of the linear equation at the current point

getValue

public double getValue(RealVector point)

Compute the value of the linear equation at the current point

Parameters:

point - point at which linear equation must be evaluated

Returns:

value of the linear equation at the current point

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object