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# XPRSgetqrowqmatrixtriplets

Purpose
Returns the nonzeros in a quadratic constraint coefficients matrix as triplets (index pairs with coefficients). To achieve maximum efficiency, XPRSgetqrowqmatrixtriplets returns the lower triangular part of this matrix only.
Topic areas
Problem Information, Quadratic
Synopsis
`int XPRS_CC XPRSgetqrowqmatrixtriplets(XPRSprob prob, int row, int * p_ncoefs, int rowqcol1[], int rowqcol2[], double rowqcoef[]);`
Arguments

prob | The current problem.
row | Index of the row for which the quadratic coefficients are to be returned.
p_ncoefs | Argument used to return the number of quadratic coefficients in the row. May be NULL if not required.
rowqcol1 | First index in the triplets. May be NULL if not required.
rowqcol2 | Second index in the triplets. May be NULL if not required.
rowqcoef | Coefficients in the triplets. May be NULL 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
XPRSloadqcqp, XPRSgetqrowcoeff, XPRSaddqmatrix, XPRSchgqrowcoeff, XPRSgetqrowqmatrix, XPRSgetqrows, XPRSchgqobj, XPRSchgmqobj, XPRSgetqobj.
Parent Topic Console and Library Functions

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