Optimization using fval function
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I am having trouble getting this code to run. The goal is to minimize the cost of a dumpster while keeping within a certain volume range using lagrange multipliers. My code runs but the error message that comes up is "Failure in initial objective function evaluation. FSOLVE cannot continue.". I am pretture sure lines 9 and 10 are wrong but can someone help me with this?
function F = Dumpster(quad)
L = quad(1);
W = quad(2);
H = quad(3);
X = quad(4);
F = [5*W+6*H-(W*H),5*L+6*H-(H*L),6*L+6*W-(W*L),L*W*H-1056];
test1 = [1,2,3,4];
[w1,fval] = fsolve(@Dumpster,test1);
w1;
fval;
end
6 个评论
Michael Hay
2021-3-6
Stephen23
2021-3-6
Note that you have written a recursive function. This means you call Dumpster, inside which you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster. Then inside that Dumpster call you call fsolve which in turn calls Dumpster... etc.
Is that your intention?
Michael Hay
2021-3-6
Stephen23
2021-3-6
"How can I fix that?"
Don't call Dumpster (even indirectly) inside Dumpster.
Probably you want to to call fsolve outside of Dumpster.
Michael Hay
2021-3-6
Michael Hay
2021-3-6
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