CPXgetxqxax

int CPXPUBLIC CPXgetxqxax(CPXCENVptr env, CPXCLPptr lp, double * xqxax, int begin, int end)

Definition file: cplex.h

Include files: cplex.h

The routine CPXgetxqxax is used to access quadratic constraint activity levels for a range of quadratic constraints in a quadratically constrained program (QCP). The beginning and end of the range must be specified.

Quadratic constraint activity is the sum of the linear and quadratic terms of the constraint evaluated with the values of the structural variables in the problem.

Parameters:

env	A pointer to the CPLEX environment as returned by `CPXopenCPLEX`.
lp	A pointer to a CPLEX problem object as returned by `CPXcreateprob`.
xqxax	An array to receive the values of the quadratic constraint activity levels for each of the constraints in the specified range. The array must be of length at least (`end-begin+1`). If successful, `x[0]` through `x[end-begin]` contain the quadratic constraint activities.
begin	An integer indicating the beginning of the range of quadratic constraint activities to be returned.
end	An integer indicating the end of the range of quadratic constraint activities to be returned.

Returns:

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