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| Purpose | ||||||||||
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Obtain the reduced cost of a named variable. | |||||||||
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| Synopsis | ||||||||||
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int QSget_named_rc (QSprob p, const char *colname, double *val) | |||||||||
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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. Note that QSget_named_rc returns an error code if it is called with a specified problem that has not been solved with one of the optimization functions ( QSopt_dual or QSopt_primal) since the last time the problem was loaded or modified. An error will also occur if the named variable is not in the LP problem. | |||||||||
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| Description | ||||||||||
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After a successful call to one of the optimization routines ( QSopt_dual or QSopt_primal), this function can be used to obtain the reduced cost of a variable specified by its name. | |||||||||
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| Example | ||||||||||
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/* p is an initialized QSprob, a handle to an existing LP problem */
/* Get the reduced cost of the variable z. */
int rval;
double val;
rval = QSget_named_rc (p, "z", &val);
if (rval) {
fprintf (stderr,
"Could not get the rc-value, error code %d\n", rval);
} else {
printf ("Reduced cost = %.6f\n", val);
}
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