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Rational Solver | ||
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| Purpose | ||||||||||
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Change a coefficient in the objective function. | |||||||||
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| Synopsis | ||||||||||
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int QSchange_objcoef (QSprob p, int indx, double coef) | |||||||||
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| Returns | ||||||||||
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A zero value if the function terminated correctly, and a non-zero value if an error occurred. | |||||||||
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| Description | ||||||||||
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Use this function to change a single coefficient in the objective function; it can be used to modify an existing non-zero coefficient or to add a new non-zero coefficient to the objective. Note that the function assumes that the column (variable) exists; use | |||||||||
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| Example | ||||||||||
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/* Change the objective coefficient of variable y to 5.0 */
int rval = 0;
int yindex;
/* Find the index of of y */
rval = QSget_column_index (p, "y", &yindex);
if (rval) {
fprintf (stderr, "could not get index, error code %d\n", rval);
} else {
if (yindex == -1) {
printf ("y is not a variable in the problem\n");
} else {
rval = QSchange_objcoef (p, yindex, 5.0);
if (rval) {
fprintf (stderr, "could not change coef, error %d\n", rval);
}
}
}
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