how to fit y=ax^b without curve fitting

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Moza Salem
Moza Salem le 5 Mar 2021
Réponse apportée : Image Analyst le 5 Mar 2021
how to fit a set of data using 𝑦 = 𝑎𝑥^b (logarithmic transformation) ?
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David Goodmanson
David Goodmanson le 5 Mar 2021
Modifié(e) : David Goodmanson le 5 Mar 2021
Hi Moza,
you can certainly take the log of both sides and try fitting the straight line
log(y) = c + b*log(x) % c = log(a)
if that's what you mean.
Moza Salem
Moza Salem le 5 Mar 2021
Yes!!! Thank you so much

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Image Analyst
Image Analyst le 5 Mar 2021
You can use fitnlm() - Fit Non-linear model. See attached for a bunch of demos where I use it on a wide variety of equations. Adapt as needed.

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