How to fit an exponential curve for every column in a matrix?

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parslee 2022-3-17

评论： parslee 2022-3-17

I have a matrix of 257x36 and each column represents a different data set.

I need to apply an exponential fit to each column and also store the fit values.

How can I go about doing this?

Torsten 2022-3-17

And what are the corresponding x-values to the y-values in the columns ?

parslee 2022-3-17

x is 1 to 257 for all of them

David Hill 2022-3-17

for k=1:36
  B{k}=fit((1:257)',A(:,k),'exp1');
end

Torsten 2022-3-17

编辑：Torsten 2022-3-17

for k=1:36
    B{k} = fit((1:257)',A(:,k),'exp1');
    coeffs = coeffvalues(B{k});
    Ahat(:,k) = coeffs(1)*exp(coeffs(2)*(1:257).');
end

parslee 2022-3-17

Thank you!!

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