how to fit an exponential curve to my signal in a plot?
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Star Strider on 31 Jul 2022
It would help to have the signal. There appears to be high-frequency noise, so the first step would be to calculate the one-sided fft, amd then using that information, design a lowpass or bandpass filter to filter it out, using the 'ImpulseResponse','iir' name-value pair for best results. The envelope function would then be helpful in defining the exponential characteristic.
I doubt that without some pre-processing it would be possible to define an exponential envelope for those data.