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XPRSgetqrowcoeff

XPRSgetqrowcoeff

Purpose
Returns a single quadratic constraint coefficient corresponding to the variable pair ( icol, jcol) of the Hessian of a given constraint.
Synopsis
int XPRS_CC XPRSgetqrowcoeff (XPRSprob prob, int row, int icol, int jcol, double *dval);
Arguments
prob 
The current problem.
row 
The quadratic row where the coefficient is to be looked up.
icol 
Column index for the first variable in the quadratic term.
jcol 
Column index for the second variable in the quadratic term.
dval 
Pointer to a double value where the objective function coefficient is to be placed.
Example
The following returns the coefficient of the x02 term in the second row, placing it in the variable value : 
double value;
...
XPRSgetqrowcoeff(prob,1,0,0,&value);
Further information
The coefficient returned corresponds to the Hessian of the constraint. That means the for constraint x + [x^2 + 6 xy] <= 10 XPRSgetqrowcoeff would return 1 as the coefficient of x^2 and 3 as the coefficient of xy.
Related topics
XPRSloadqcqp, XPRSaddqmatrix, XPRSchgqrowcoeff, XPRSgetqrowqmatrix, XPRSgetqrowqmatrixtriplets, XPRSgetqrows, XPRSchgqobj, XPRSchgmqobj, XPRSgetqobj.

Parent Topic Console and Library Functions

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