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CPXdjfrompi

int CPXPUBLIC CPXdjfrompi(CPXCENVptr env, CPXCLPptr lp, const double * pi, double * dj)
Definition file: cplex.h
Include files: cplex.h
Note

This is an advanced routine. Advanced routines typically demand a profound understanding of the algorithms used by ILOG CPLEX. Thus they incur a higher risk of incorrect behavior in your application, behavior that can be difficult to debug. Therefore, ILOG encourages you to consider carefully whether you can accomplish the same task by means of other Callable Library routines instead.

The routine CPXdjfrompi computes an array of reduced costs from an array of dual values. This routine is for linear programs. Use CPXqpdjfrompi for quadratic programs.

Example

 status = CPXdjfrompi (env, lp, pi, dj);

Parameters:

env

A pointer to the CPLEX environment as returned by CPXopenCPLEX.

lp

A pointer to a CPLEX LP problem object as returned by CPXcreateprob.

pi

An array that contains dual solution (pi) values for the problem, as returned by routines such as CPXuncrushpi and CPXcrushpi. The array must be of length at least the number of rows in the problem object.

dj

An array to receive the reduced cost values computed from the pi values for the problem object. The array must be of length at least the number of columns in the problem object.

Returns:

The routine returns zero on success and nonzero if an error occurs.