Purpose
Add a quadratic term to the
objective function.
Synopsis
int XPRBaddqterm(XPRBprob prob, XPRBvar var1, XPRBvar var2,
double coeff);
Arguments
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prob
|
Reference to a problem.
|
|
var1
|
Reference to a variable.
|
|
var2
|
Reference to a variable (not necessarily different).
|
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coeff
|
Value to be added to the coefficient of the term var1 * var2.
|
Return value
0 if function executed successfully, 1 otherwise.
Example
The following example adds the term -2*x2*x4 to the objective function:
XPRBprob prob;
XPRBvar x2,x4;
...
x2 = XPRBnewvar(prob, XPRB_PL, "abc1", 0, XPRB_INFINITY);
x4 = XPRBnewvar(prob, XPRB_PL, "abc5",0 , XPRB_INFINITY);
XPRBaddqterm(prob,x2,x4,-2);
Further information
This function adds a new quadratic term to the objective function, comprising the product of the variables var1 and var2 with coefficient coeff. If the objective already has a term with variables var1 and var2, coeff is added to its coefficient.
Related topics
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