Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-401. Error in fminsearch (line 200) fv(:,1) = funfcn(x,varargin{:});

Question

Arbenit Kryeziu 2019-2-18

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https://ww2.mathworks.cn/matlabcentral/answers/445652-unable-to-perform-assignment-because-the-size-of-the-left-side-is-1-by-1-and-the-size-of-the-right-s

回答： mohammad hodaei 2019-12-18

采纳的回答： Patel Mounika

zahl = [1:1:401];

fun_normal = @(x)(normpdf(zahl,x(1),x(2)) + unifpdf(zahl,0,x(3)));

x0=[max(zahl),5,30];

x = fminsearch(fun_normal,x0);

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Answer 1

Patel Mounika 2019-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/445652-unable-to-perform-assignment-because-the-size-of-the-left-side-is-1-by-1-and-the-size-of-the-right-s#answer_362015

The objective function (first input argument of "fminsearch") should return a scalar value to be minimized. However, the function "fun_normal" used in the code doesn’t return scalar value. So, try redefining the function such that it returns a scalar value to use fminsearch.