Initializing help system before first use

problem.chgQRowCoeff

Purpose
Changes a single quadratic coefficient in a row.
Topic areas
Problem Modification, Quadratic
Synopsis
problem.chgQRowCoeff(row, rowqcol1, rowqcol2, rowqcoef)
Arguments
row 
Index of the row where the quadratic matrix is to be changed.
rowqcol1 
First index of the coefficient to be changed.
rowqcol2 
Second index of the coefficient to be changed.
rowqcoef 
The new coefficient.
Further information
1. This function may be used to add new nonzero coefficients, or even to define the whole quadratic expression with it. Doing that, however, is significantly less efficient than adding the whole expression with problem.addQMatrix.
2. Argument row may contain xpress.constraint objects instead of indices.
3. Arguments rowqcol1, rowqcol2 may contain xpress.var objects instead of indices.
Related topics
problem.loadQCQP, problem.getQRowCoeff, problem.addQMatrix, problem.chgQRowCoeff, problem.getQRowQMatrix, problem.getQRowQMatrixTriplets, problem.getQRows, problem.chgQObj, problem.chgMQObj, problem.getQObj.

Parent Topic Methods of the class problem

© 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.