How can I make logaritmic fitting like polyfit function

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Dogan Arik
Dogan Arik 2018-10-19
评论： Dogan Arik 2018-10-22
Hi;
I want to make logaritmic fitting but I don't find any logfit function like polyfit. Is there any function,script etc. that make logaritmic curve fitting in matlab
-edit- (19.10.2018 - 15:20)
I want to this type of curve fitting.

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Torsten
Torsten 2018-10-19
Fit log(x) against y using a linear polynomial in "polyfit". What's the problem ?
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Torsten
Torsten 2018-10-22
编辑：Torsten 2018-10-22
x are your input data, y are your output data in both suggestions.
If you have matrices of input and output data, make them to vectors by using
x = x(:);
y = y(:);
Best wishes
Torsten.
Dogan Arik
Dogan Arik 2018-10-22
I have not problem with convert matrices to vectors.
fun = @(p,x) p(2)*exp(p(1)*x);
p0 = [1, 1];
p = lsqcurvefit(fun,p0,x,y)
yfit = fun(p,x);
plot(x,y,x,yfit)
I change my code according second code you suggest, then it solves my problem .
Thanks for all thing;

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