CPXcopyorder

Description

The routine CPXcopyorder() is used to copy a priority order to a CPLEX problem object of type CPXPROB_MILP or CPXPROB_MIQP. During branching, integer variables with higher priorities are given preference over integer variables with lower priorities. Priorities must be positive integers. A preferred branching direction may also be specified for each variable.

Parameter CPX_PARAM_MIPORDIND must be set to CPX_ON, its default value, for the priority order to be used in a subsequent optimization.

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

int CPXcopyorder (CPXCENVptr env, CPXLPptr lp, int cnt, const int *indices, const int *priority, const int *direction);

Arguments

The pointer to the CPLEX environment as returned by CPXopenCPLEX().

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

An integer giving the number of entries in the list.

An array of length cnt containing the numerical indices of the columns corresponding to the integer variables that are assigned priorities.

An array of length cnt containing the priorities assigned to the integer variables. The entry priority[j] is the priority assigned to variable indices[j]. May be NULL.

An array of type integer containing the branching direction assigned to the integer variables. The entry direction[j] is the direction assigned to variable indices [j]. May be NULL. Possible settings for direction[j] are:

status = CPXcopyorder (env, lp, cnt, indices, priority, direction);

See Also