How to use code constraint file for fmincon function
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I am a beginner, i am trying to use the fmincon function to optimize the design of a separator vessel,in the constraint file i have a variable (Urg) which is calculated earlier in the program the constraint is (c4=Urg*(x(1)-Lll)-x(2)*Uog; when i run the program it gives me error Undefined function or variable 'Urg'.Pleas how to solve this problem and when i call Urg it gives its calculated value.
回答（2 个）
Matt J
2013-9-26
0 个投票
We can only assume (especially without seeing code) that you accidentally cleared Urg.
Alan Weiss
2013-9-30
0 个投票
It is possible that you calculate the value Urg in one function and then try to use it in another. There is a documented way to share a result between the objective function and nonlinear constraint functions.
But without further details I am just guessing.
Alan Weiss
MATLAB mathematical toolbox documentation
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2013-9-25
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