optimization function in matlab

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mohammed hussein
mohammed hussein 2015-11-29
评论： mohammed hussein 2015-11-30
i would like to ask about the optimization in matlab function that works with multi variable input with each input has different boundaries the output is only one variables

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John D'Errico
John D'Errico 2015-11-29
help fmincon
Or, as found on the file exchange, fminsearchbnd.
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John D'Errico
John D'Errico 2015-11-30
Read the help for fmincon.
You cannot simply pass in a list of variables in any order as arguments and expect fmincon to know that the 3rd and 4th arguments are to be interpreted as bounds.
READ THE HELP!!!!!
[x,fval,exitflag,output] = fmincon(fun,x0,[],[],[],[],Lb,Ub);
As you were passing in those arguments, fmincon thought they were to be treated as the equations for a set of linear INEQUALITY constraints. As such, what it thought were A and b were inconsistent in size.

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Torsten
Torsten 2015-11-30
fun = @(x)(x(1)-5)^2+(x(2)+6)^2+x(3);
x0 = [1 1 1];
Lb=[0 -1 2];
Ub=[1 2 3];
[x,fval,exitflag,output] = fmincon(fun,x0,[],[],[],[],Lb,Ub);
disp(fval)
Best wishes
Torsten.

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