Difference between revisions of "OptSlack"
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''[[New to Analytica 4.3]]. Prior to Analytica 4.3, was named [[LpSlack]].'' | ''[[New to Analytica 4.3]]. Prior to Analytica 4.3, was named [[LpSlack]].'' | ||
| − | = OptSlack( | + | = OptSlack(opt) = |
| − | Returns the slack, or surplus, values for the constraints at the optimal solution. | + | Returns the slack, or surplus, values for the constraints at the optimal solution. «opt» is a problem specified by [[DefineOptimization]]. |
As an example, consider the following example constraint: | As an example, consider the following example constraint: | ||
| Line 13: | Line 13: | ||
Suppose the optimal solution is found at (1,2,3). Then the left-hand side of this constraint at the optimum is 8. The slack, therefore, is 14-8 = 6. In other words, the right-hand side coefficient could be decreased by 6 units before the optimal solution would be impacted. | Suppose the optimal solution is found at (1,2,3). Then the left-hand side of this constraint at the optimum is 8. The slack, therefore, is 14-8 = 6. In other words, the right-hand side coefficient could be decreased by 6 units before the optimal solution would be impacted. | ||
| − | A slack of zero indicates that the constraint is one that is actively constraining the optimal solution. | + | A slack of zero indicates that the constraint is one that is actively constraining the optimal solution. |
= See Also = | = See Also = | ||
Revision as of 23:44, 10 February 2011
New to Analytica 4.3. Prior to Analytica 4.3, was named LpSlack.
OptSlack(opt)
Returns the slack, or surplus, values for the constraints at the optimal solution. «opt» is a problem specified by DefineOptimization.
As an example, consider the following example constraint:
5 x1 + 3 x2 - x3 <= 14
Suppose the optimal solution is found at (1,2,3). Then the left-hand side of this constraint at the optimum is 8. The slack, therefore, is 14-8 = 6. In other words, the right-hand side coefficient could be decreased by 6 units before the optimal solution would be impacted.
A slack of zero indicates that the constraint is one that is actively constraining the optimal solution.
See Also
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