fminsearch vector of results

Question

MARCO FORTI 2021-4-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/795352-fminsearch-vector-of-results

评论： MARCO FORTI 2021-4-8

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Here's my model:

Given the model, my intention is to estimate γ having the values of C,

and

.

I tryed with the following code, but the program returns me only one value for γ while I need the vector containing every value produced in the loop.

How can I fix the code to get it?

j=1; %increment level. The loop will work for j>1 as well.
for i=1:j:steps;
fnc = @(gamma,C,Sum_I) C(i)./(1+gamma) - (gamma./(1+gamma)).*Sum_I(i);  % Model function
rn = @(gamma) norm(I - fnc(gamma,C,Sum_I)); % Residual norm
gamma0 = [15]; % Inizializzazione
[gamma, ResNorm] = fminsearch(rn, gamma0);  
end

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Answer 1

Walter Roberson 2021-4-7

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/795352-fminsearch-vector-of-results#answer_669497

在 MATLAB Online 中打开

steps = 5;
C = @cos;
Sum_I = @atan;
I = 42;
j=1; %increment level. The loop will work for j>1 as well.
for i=1:j:steps;
fnc = @(gamma,C,Sum_I) C(i)./(1+gamma) - (gamma./(1+gamma)).*Sum_I(i);  % Model function
rn = @(gamma) norm(I - fnc(gamma,C,Sum_I)); % Residual norm
gamma0 = [15]; % Inizializzazione
[gamma(i), ResNorm(i)] = fminsearch(rn, gamma0);  
end
gamma
gamma = 1×5
   -0.9690   -0.9840   -0.9940   -0.9845   -0.9618