Error in optimization process
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I am trying to fit a gumbel distribution on a series of data. So I want to minimize the negative of maximum likelihood by optimizing two variables var(1) and var(2). This is my code:
X=xlsread('file.xlsx');
options = optimset('MaxFunEvals',1000,'FinDiffType','central');
options=optimset(options,'Display','iter','MaxIter',1000,'TolCon',1e-6);
lb=0;
ub=Inf;
var=zeros(2,1);
x = fmincon(@(var)Gumbel(var,X),1,1,[],[],[],[],lb,ub,[],options);
and my Gumbel function is:
function f=Gumbel(var, X)
f=-sum(log((1./var(1)).*exp(-(X-var(2))./var(1)-exp(-(X-var(2))./var(1)))))
Can someone help me why I am getting errors?! Thanks
2 个评论
Shashank Prasanna
2013-10-4
What are you errors? Can you post it here?
采纳的回答
Your input arguments are out of sequence. Also, you have too many of them. fmincon can only accept 10 inputs and you've passed in 11.
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