Initializing help system before first use

problem.getqrowqmatrixtriplets

Purpose
Returns the nonzeros in a quadratic constraint coefficients matrix as triplets (index pairs with coefficients). To achieve maximum efficiency, getqrowqmatrixtriplets returns the lower triangular part of this matrix only.
Synopsis
problem.getqrowqmatrixtriplets(row, rowqcol1, rowqcol2, rowqcoef)
Arguments
row 
Row (i.e. xpress.constraint object, index, or name) for which the quadratic coefficients are to be returned.
rowqcol1 
First index in the triplets. May be None if not required.
rowqcol2 
Second index in the triplets. May be None if not required.
rowqcoef 
Coefficients in the triplets. May be None if not required.
Further information
If a row index of -1 is used, the function returns the quadratic coefficients for the objective function.
Related topics
problem.loadproblem, problem.getqrowcoeff, problem.addqmatrix, problem.chgqrowcoeff, problem.getqrowqmatrix, problem.getqrows, problem.chgqobj, problem.chgmqobj, problem.getqobj.

Parent Topic Xpress problem methods

© 2001-2025 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.