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XPRSgetqobj

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Purpose

Returns a single quadratic objective function coefficient corresponding to the variable pair (icol, jcol) of the Hessian matrix.

Synopsis

int XPRS_CC XPRSgetqobj(XPRSprob prob, int icol, int jcol, double *dval);

Arguments

prob	The current problem.
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 objective function, placing it in the variable value :

double value;
...
XPRSgetqobj(prob,0,0,&value);

Further information

dval is the coefficient in the quadratic Hessian matrix. For example, if the objective function has the term [3x₁x₂ + 3x₂x₁]/2 the value retrieved by XPRSgetqobj is 3.0 and if the objective function has the term [6x₁²]/2 the value retrieved by XPRSgetqobj is 6.0.

Related topics

XPRSchgqobj, XPRSchgmqobj.

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