Initializing help system before first use

# problem.chgObj

Purpose
Used to change the objective function coefficients.
Topic areas
Problem Modification, Optimizer
Synopsis
`problem.chgObj(colind, objcoef)`
Arguments

colind: list[var] | Integer array containing the indices of the columns whose objective coefficients will change. An index of -1 indicates that the fixed part of the objective function on the right hand side should change.
objcoef: list[float] | Double array giving the new objective function coefficients.

Further information
1. The value of the fixed part of the objective function can be obtained using the OBJRHS problem attribute.
2. Argument colind may contain either xpress.var objects or integer indices.
Related topics
problem.chgCoef, problem.chgMCoef, problem.chgMQObj, problem.chgQObj, problem.getObj.
Parent Topic Xpress problem object methods

© 2001-2026 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.