CPXXobjsa and CPXobjsa

The routine CPXXobjsa/CPXobjsa accesses upper and lower sensitivity ranges for objective function coefficients for a specified range of variable indices.

int CPXXobjsa( CPXCENVptr env, CPXCLPptr lp, CPXDIM begin, CPXDIM end, double * lower, double * upper )

int CPXobjsa( CPXCENVptr env, CPXCLPptr lp, int begin, int end, double * lower, double * upper )

Description

The routine CPXXobjsa/CPXobjsa accesses upper and lower sensitivity ranges for objective function coefficients for a specified range of variable indices. The beginning and end of the range of variable indices must be specified.

Note: Information for variable j, where begin <= j <= end, is returned in position (j-begin) of the arrays lower and upper. The items lower[j-begin] and upper[j-begin] contain the lowest and highest value the objective function coefficient for variable j can assume without affecting the optimality of the solution.

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.
begin: An integer specifying the beginning of the range of ranges to be returned.
end: An integer specifying the end of the range of ranges to be returned.
lower: An array where the objective function lower range values are to be returned. This array must be of length at least (end-begin+1).
upper: An array where the objective function upper range values are to be returned. This array must be of length at least (end-begin+1).

Return

The routine returns 0 (zero) if successful and nonzero if an error occurs. This routine fails if no optimal basis exists.

Example


status = CPXobjsa (env, lp, 0, CPXgetnumcols(env,lp)-1,
	    lower, upper);