XPRSaddqmatrix, XPRSaddqmatrix64
XPRSaddqmatrix, XPRSaddqmatrix64 |
Purpose
Adds a new quadratic matrix into a row defined by triplets.
Synopsis
int XPRS_CC XPRSaddqmatrix(XPRSprob prob, int irow, int nqtr, const int mqc1[], const int mqc2[], const double dqe[]);
int XPRS_CC XPRSaddqmatrix64(XPRSprob prob, int irow, XPRSint64 nqtr, const int mqc1[], const int mqc2[], const double dqe[]);
Arguments
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prob
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The current problem.
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irow
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Index of the row where the quadratic matrix is to be added.
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nqtr
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Number of triplets used to define the quadratic matrix. This may be less than the number of coefficients in the quadratic matrix, since off diagonals and their transposed pairs are defined by one triplet.
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mqc1
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First index in the triplets.
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mqc2
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Second index in the triplets.
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dqe
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Coefficients in the triplets.
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Further information
1. The triplets should be filled to define the upper-triangular part of the quadratic expression. This means that to add
[x2 + 6 xy] the
dqe arrays shall contain the coefficients 1 and 3, respectively.
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
XPRSloadqcqp,
XPRSgetqrowcoeff,
XPRSchgqrowcoeff,
XPRSgetqrowqmatrix,
XPRSgetqrowqmatrixtriplets,
XPRSgetqrows,
XPRSchgqobj,
XPRSchgmqobj,
XPRSgetqobj.