CPXXpperwrite and CPXpperwrite
When solving degenerate linear programs with the primal simplex method, CPLEX may initiate a perturbation of the bounds of the problem in order to improve performance.
int CPXXpperwrite( CPXCENVptrenv, CPXLPptrlp, char const *filename_str, doubleepsilon )
int CPXpperwrite( CPXCENVptrenv, CPXLPptrlp, char const *filename_str, doubleepsilon )
Description
When solving degenerate linear programs with the primal simplex method,
CPLEX may initiate a perturbation of the bounds of the problem in order to
improve performance. The routine CPXXpperwrite/CPXpperwrite writes a
similarly perturbed problem to a binary SAV format file.
Arguments
- env
-
A pointer to the CPLEX environment as returned by
CPXXopenCPLEX/CPXopenCPLEX. - lp
-
A pointer to a CPLEX problem object as returned by
CPXXcreateprob/CPXcreateprob. - filename_str
- A character string containing the name of the file to which the perturbed problem should be written.
- epsilon
- The perturbation constant.
Return
The routine returns 0 (zero) if successful and nonzero if an error occurs.Example
status = CPXpperwrite (env, lp, "myprob.ppe", epsilon);