Fmincon solution is same as initial guess
显示 更早的评论
Hello,
My Fmincon function does not minimize the cost function, instead, it reports the same initial guess provided to it. Please help with recommendations to the piece of code below:
function J=cost_function(y)
for i=1:size(a,1)
AA = y0*b(i,:)';
BB = y0*c(i,:)';
CC = (y0(1).*c(i,1)/BB)*c(i,1) + (y0(2).*c(i,2)/BB)*c(i,2);
DD = y0*d(i,:)';
EE = y0*e(i,:)';
all(i,:)=[AA, BB, CC, DD, EE];
end
J=sum(abs(all(1,:) - x(1:5)') ./ x(1:5)')^2;
The script calculates the a, b, c, d, e,....... and passes them to the function along with "y0".
Please advise, and thanks in advance
采纳的回答
Sulaymon Eshkabilov
2021-7-14
编辑：Sulaymon Eshkabilov
2021-7-14
THere are a couple of errs oin your fcn, i.e. y0, a,b,c,d not defined. Moreover, x is not defined.
function J=cost_function(y0, a, b, c, d, e, x)
for i=1:size(a,1)
AA = y0*b(i,:)';
BB = y0*c(i,:)';
CC = (y0(1).*c(i,1)/BB)*c(i,1) + (y0(2).*c(i,2)/BB)*c(i,2); % Check: multiplied and divided by c(i,1) and c(i,2)
DD = y0*d(i,:)';
EE = y0*e(i,:)';
all(i,:)=[AA, BB, CC, DD, EE];
end
J=sum(abs(all(1,:) - x(1:5)') ./ x(1:5)')^2;
4 个评论
Samy Alkhayat
2021-7-14
Sulaymon Eshkabilov
2021-7-14
yes.
Samy Alkhayat
2021-7-14
Sulaymon Eshkabilov
2021-7-15
Most welcome!
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Design, Analysis, Benchmarking, and Verification 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
