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# UFL Class Reference

`#include <ufl.hpp>`

Inheritance diagram for UFL:

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Collaboration diagram for UFL:

[legend]
List of all members.

## Public Member Functions
int | compute_rc (const VOL_dvector &u, VOL_dvector &rc)
| compute reduced costs
int | solve_subproblem (const VOL_dvector &u, const VOL_dvector &rc, double &lcost, VOL_dvector &x, VOL_dvector &v, double &pcost)
| Solve the subproblem for the subgradient step.
int | heuristics (const VOL_problem &p, const VOL_dvector &x, double &heur_val)
| Starting from the primal vector x, run a heuristic to produce an integer solution.
| UFL ()
virtual | ~UFL ()
## Public Attributes
VOL_dvector | fcost
VOL_dvector | dist
VOL_dvector | fix
int | ncust
int | nloc
VOL_ivector | ix
double | icost

## Detailed Description

Definition at line 28 of file ufl.hpp.

## Constructor & Destructor Documentation

UFL::UFL | ( |  | ) | `[inline]`

Definition at line 52 of file ufl.hpp.

virtual UFL::~UFL | ( |  | ) | `[inline, virtual]`

Definition at line 53 of file ufl.hpp.

## Member Function Documentation

int UFL::compute_rc | ( | const VOL_dvector & | u,
|  | VOL_dvector & | rc |
| ) |  |  | `[virtual]`

compute reduced costs

Parameters:

  | u | (IN) the dual variables
  | rc | (OUT) the reduced cost with respect to the dual values

Implements VOL_user_hooks.

int UFL::solve_subproblem | ( | const VOL_dvector & | u,
|  | const VOL_dvector & | rc,
|  | double & | lcost,
|  | VOL_dvector & | x,
|  | VOL_dvector & | v,
|  | double & | pcost |
| ) |  |  | `[virtual]`

Solve the subproblem for the subgradient step.

Parameters:

  | dual | (IN) the dual variables
  | rc | (IN) the reduced cost with respect to the dual values
  | lcost | (OUT) the lagrangean cost with respect to the dual values
  | x | (OUT) the primal result of solving the subproblem
  | v | (OUT) b-Ax for the relaxed constraints
  | pcost | (OUT) the primal objective value of `x`

Implements VOL_user_hooks.

int UFL::heuristics | ( | const VOL_problem & | p,
|  | const VOL_dvector & | x,
|  | double & | heur_val |
| ) |  |  | `[virtual]`

Starting from the primal vector x, run a heuristic to produce an integer solution.

Parameters:

  | x | (IN) the primal vector
  | heur_val | (OUT) the value of the integer solution (return `DBL_MAX` here if no feas sol was found

Implements VOL_user_hooks.

## Member Data Documentation

VOL_dvector UFL::fcost

Definition at line 44 of file ufl.hpp.

VOL_dvector UFL::dist

Definition at line 45 of file ufl.hpp.

VOL_dvector UFL::fix

Definition at line 46 of file ufl.hpp.

int UFL::ncust

Definition at line 48 of file ufl.hpp.

int UFL::nloc

Definition at line 48 of file ufl.hpp.

VOL_ivector UFL::ix

Definition at line 49 of file ufl.hpp.

double UFL::icost

Definition at line 50 of file ufl.hpp.

The documentation for this class was generated from the following file:

- /home/coin/SVN-release/Osi-0.98.1/Vol/examples/VolUfl/ufl.hpp