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| Purpose |
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Pivot columns into the basis.
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| Synopsis |
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int QSopt_pivotin_col (QSprob p, int ccnt, int *clist)
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| Arguments |
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p |
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a handle to an initialized problem. |
ccnt |
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the number of columns to be pivoted into the basis. |
clist |
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an array of length ccnt; each entry specifies the index of a column (so a value between 0 and ncols - 1, where ncols is the number of columns in the problem). |
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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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This function attempts to pivot into the current basis the columns specified in clist. The routine sequentially pivots in the columns. The leaving column in each pivot is a column (not one in the list) that results in the least movement from the current solution, chosen from among the columns that yield suitable pivot values.
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| Example |
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/* p is an initialized QSprob, a handle to an existing LP problem. */
/* Pivot column 2 into the basis. */
int rval;
int collist[1] = { 2 };
rval = QSopt_pivotin_col (p, 1, collist);
if (rval) {
fprintf (stderr,
"QSopt_pivotin_col failed with return code %d\n", rval);
}
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