'How to define lmfit model for complex functions?
I am working on cole cole model which basically exhibits how the permittivity varies with respect to frequency and is given by; enter image description here
Where, ε_∞ is the higher permittivity,
ε_s is the static permittivity ε_s>ε_∞,
ε_(o) is 8.854e-12,
ω=2πf,
α is the relaxation time 0≪α≪1 σ is the conductivity (can be a CONSTANT) I tried one of the examples given here https://lmfit.github.io/lmfit-py/examples/example_complex_resonator_model.html but was not able to follow along. Currently I have frequency vs real permittivity data. I want to fit the model to my measured data by using lmfit and guess the values from the fit. Basically i want to fit the real part of permittivity to the model.
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