problem.addqmatrix
problem.addqmatrix |
Purpose
Adds a new quadratic matrix into a row defined by triplets.
Synopsis
problem.addqmatrix(irow, mqc1, mqc2, dqe)
Arguments
|
irow
|
Row (i.e.
xpress.constraint object, index, or name) where the quadratic matrix is to be added.
|
|
mqc1
|
Array with first variables (i.e.
xpress.varobjects, indices, or names) in the triplets.
|
|
mqc2
|
Array with second variables (i.e.
xpress.varobjects, indices, or names) index in the triplets.
|
|
dqe
|
Array of coefficients in the triplets.
|
Further information
1. The triplets should define the upper triangular part of the quadratic expression. This means that to add
x2 + 4 xy the
dqe array shall contain the coefficients 1 and 2.
2. The matrix defined by
mqc1,
mqc2 and
dqe should be positive semi-definite for ≤ and negative semi-definite for ≥ rows.
3. The row must not be an equality or a ranged row.
Related topics
problem.loadproblem,
problem.getqrowcoeff,
problem.chgqrowcoeff,
problem.getqrowqmatrix,
problem.getqrowqmatrixtriplets,
problem.getqrows,
problem.chgqobj,
problem.chgmqobj,
problem.getqobj.