Error using optimoptions (line 124)

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Vishakha Ranade
Vishakha Ranade 2020-11-4
评论： Bruno Luong 2020-11-5
I am getting the error message mentioned in the title while executing following line
opts = optimoptions('fmincon','Algorithm','interior-point');
I tried setting the default path through
restoredefaultpath
savepath
rehash toolboxcache
Still getting the same error. Can someone help?
Thanks
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Mario Malic
Mario Malic 2020-11-5
Get the code from link and try it.
Vishakha Ranade
Vishakha Ranade 2020-11-5
I tried following code as you suggested
options = optimoptions('fmincon','Display','iter','Algorithm','sqp');
fun = @(x)100*(x(2)-x(1)^2)^2 + (1-x(1))^2;
A = [];
b = [];
Aeq = [];
beq = [];
lb = [];
ub = [];
nonlcon = @unitdisk;
x0 = [0,0];
x = fmincon(fun,x0,A,b,Aeq,beq,lb,ub,nonlcon,options)
with the unitdisk defined in other file with same name as
function [c,ceq] = unitdisk(x)
c = x(1)^2 + x(2)^2 - 1;
ceq = [];
Getting the following error
Error using optimoptions (line 124)
Empty keys are not allowed in this container.
Error in problem (line 1)
options = optimoptions('fmincon','Display','iter','Algorithm','sqp');
Can you figure out what must be going wrong?
Thanks for spending your time on my problem

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采纳的回答

VBBV
VBBV 2020-11-5
编辑：VBBV 2020-11-5
%if true
% code
% end
opts = optimoptions(@fmincon,'Algorithm','interior-point');
Try function handle for passing solver name
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Vishakha Ranade
Vishakha Ranade 2020-11-5
I referred to the link you have sent.
Looks like my problem would be solved. Thanks a lot

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更多回答（1 个）

Bruno Luong
Bruno Luong 2020-11-5
编辑：Ameer Hamza 2020-11-5
Make sure you have optimization toolbox installed
>> ver
-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.9.0.1495850 (R2020b) Update 1
MATLAB License Number: xxxxxx
Operating System: Microsoft Windows 10 Home Version 10.0 (Build 19042)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB Version 9.9 (R2020b)
MATLAB Compiler Version 8.1 (R2020b)
Optimization Toolbox Version 9.0 (R2020b)
Signal Processing Toolbox Version 8.5 (R2020b)
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Vishakha Ranade
Vishakha Ranade 2020-11-5
Thanks a lot. My problem is solved by reinstalling global optimization toolbox. I had already installed the optimization toolbox previously.
Somehow global optimization solved the problem.
Bruno Luong
Bruno Luong 2020-11-5
Odd I don't own global optimization toolbox and it works for me.

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