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Ι have a problem finding a minimum

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joanna zappa
joanna zappa 2016-1-6
关闭： MATLAB Answer Bot 2021-8-20
I created a fuction by writting
function [y]=h(x)
y=(x^8+P(x))^2
end
and I saved it as h.m then I wrote
[x,fval]=fminsearch(h,[2,3])
and it says its error FYI P(x) is a polynomial which i created in the main file
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回答（2 个）

jgg
jgg 2016-1-6
It looks like the issue is that you have not passed P into your function. You probably want something like this instead:
P=polyfit(X,Y.',7);
func = @(x)h(x,P);
[x,fval]=fminsearch(func,[2,3])
where you define in your h.m file
function [y]=h(x,P)
p = polyval(P,x);
y=(x^8+p)^2
end
Walter Roberson
Walter Roberson 2016-1-6
Answered in duplicate Question http://uk.mathworks.com/matlabcentral/answers/262900-have-a-problem-finding-a-minimum
It sure is easier when people do not ask duplicate questions...

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