Finding global minimum with rand
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I'm supposed to use the MATLAB function "rand" to generate a large number of random vectors in 3-space, with coordinates between −6 and 6. Then I have to evaluate f at those points to find the minimum. But I don't know if I'm doing it correctly. My function is f(x, y,z) = x^4 + y^4 + z^4 − 3*x^2 − 8*y^2 − 6*x*z − 4*x*y − 10*z^2 + 6*y. Here's what I have so far:
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fumin = Inf;
for i = 1:100000
u = -6 + 12*rand(3,1);
fu = f(u);
if fu < fumin
umin = u;
fumin = fu;
end
end
3 个评论
Ikenna Iwudike
2022-4-2
编辑：Ikenna Iwudike
2022-4-2
This error message cannot stem from my code above.
At least if f is defined as you showed us:
f = @(u) u(1)^4 ... etc.
Ikenna Iwudike
2022-4-2
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