XPRSgetlastbarsol

Purpose

Used to obtain the last barrier solution values following optimization that used the barrier solver.

Synopsis

 int XPRS_CC XPRSgetastbarsol(XPRSprob prob, double x[], double slack[], double dual[], double dj[], int *barsolstatus);

Arguments

prob	The current problem.
x	Double array of length COLS where the values of the primal variables will be returned. May be NULL if not required.
slack	Double array of length ROWS where the values of the slack variables will be returned. May be NULL if not required.
dual	Double array of length ROWS where the values of the dual variables ( c_B^TB^-1) will be returned. May be NULL if not required.
dj	Double array of length COLS where the reduced cost for each variable ( c^T-c_B^TB^-1A) will be returned. May be NULL if not required.
barsolstatus	Status of the last barrier solve. Value matches that of XPRS_LPSTATUS should the solve have been stopped immediately after the barrier.

Further information

1. If the barrier solver has not been used, barsolstatus will return XPRS_LP_UNSOLVED.

2. The barrier solution or the solution candidate is always available if the status is not XPRS_LP_UNSOLVED.

3. The last barrier solution is available until the next solve, and is not invalidated by otherwise working with the problem.