Need assistance in fitting tool

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Bayram Akpinar
Bayram Akpinar 2021-4-7
评论： Bayram Akpinar 2021-4-7
Dear community I am struggling with the curve fit tool .
I have a plot where the fit supposed to be done but it gives me error and the x-axis is not in log scale.
How can I change the x-axis to log scale in the cvtoool.
Also I am not sure if the custom equation is right .

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回答（1 个）

Steven Lord
Steven Lord 2021-4-7
Ran in:
"2pi" is not a valid way to write 2π in MATLAB.
y = 2*pi
y = 6.2832
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Steven Lord
Steven Lord 2021-4-7
What is the exact text of the error message you receive now?
Bayram Akpinar
Bayram Akpinar 2021-4-7
'Complex value computed by model function, fitting cannot continue.
Try using or tightening upper and lower bounds on coefficients.'
This error message is givene within the Cure Fitting Tool. I also need to change the x-axis scale to a log scale. I can do that when i go to file--> print to figure. But did not succeed in getting that plot into the tool where I put my equation in.

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