XPRSgetqobj
XPRSgetqobj |
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 x
0
2 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 [3x
1x
2 + 3x
2x
1]/2 the value retrieved by
XPRSgetqobj is
3.0 and if the objective function has the term [6x
1
2]/2 the value retrieved by
XPRSgetqobj is
6.0.
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