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problem.getqrowqmatrixtriplets

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(irow, mqcol1, mqcol2, dqe)
Arguments
irow 
Row (i.e. xpress.constraint object, index, or name) for which the quadratic coefficients are to be returned.
nqelem 
Argument used to return the number of quadratic coefficients in the row.
mqcol1 
First index in the triplets. May be None if not required.
mqcol2 
Second index in the triplets. May be None if not required.
dqe 
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 Reference Manual

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