How can I run this costfunction optimization ?
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I am trying to run this optimization:
function [jVal,gradient]=costfunction(theta);
jVal=(theta(1)-5)^2+(theta(2)-5)^2;
gradient=zeros(2,1),
gradient(1)=2*(theta(1)-5);
gradient(2)=2*(theta(2)-5);
options=optimset('Gradobj','on','MaxIter',100)
initialTheta=zeros(1,2)
[optTheta,functionVal,exitFlag]=fminunc(@costfunction,initialTheta,options)
But it says that you need more arguements for theta. How should I define theta for this function while I want matlab to calculate and minimize it?
TNX
1 个评论
Walter Roberson
2013-11-18
Could you show the exact error message?
回答（1 个）
Anisha Mishra
2020-8-22
0 个投票
You have initialised initialTheta = zeros(1,2) which makes an empty 1x2 matrix , i.e , it has 1 row and two columns
where as the theta is a vector with 2 rows and 1 column ,i.e 2x1
So change your initialTheta as:
initialTheta=zeros(2,1);
This will solve your error.
Hope this helps.
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2013-11-18
2020-8-22
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