Why do I get Cannot fit Power functions to data where X has nonpositive values when using the curve fitting tool?
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Maybe my question is obvious, but I am trying to estimate a curve with negative values for x using the "power1" type curve fitting tool. However, Matlab shows me the following error: "Cannot fit Power functions to data where X has nonpositive values".
My question is, is there a way to get rid of this error, or by mathematical construction is it impossible?
I attach my x and y values.
Thank you in advance!