Store fit output and call them later

Question

Hussein Kokash 2021-6-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/860570-store-fit-output-and-call-them-later

评论： Hussein Kokash 2021-6-20

Dears, hope all are doing great!

I have the following script I use to read files and then fit them using curve fitting, my goal is to store the output of the fit for each file so that I can plot them all using the same x-axis, so the idea is to replace y values with the new fit output for each file, how is that possible?

Thank you, appreciate it.

[file_list, path_n] = uigetfile('.txt', 'Multiselect', 'on');

filesSorted = natsortfiles(file_list);

if iscell(filesSorted) == 0;

filesSorted = (filesSorted);

end

for i = 1:length(filesSorted);

filename = filesSorted{i};

data = load([path_n filename]);

x = data (:,1);

y = data (:,2);

T = data (1,3);

Time(i) = T;

% Curve fitting

f=fit(x, y, 'fourier1')

%figure(i)

plot(f, x, y)

hold on

formula(f)

coefficients = coeffvalues(f)

end

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Answer 1

Walter Roberson 2021-6-20

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/860570-store-fit-output-and-call-them-later#answer_728800

在 MATLAB Online 中打开

f=fit(x, y, 'fourier1')

Once you have that, you could record f in a cell array.

Or... you can invoke

    saved_x{i} = x;
    saved_y{i} = y;
    predicted_y{i} = f(x);
    

Here, predicted_y{i} will become a numeric vector of what the model values predict for the given x values; you would not need the fit object after that.