[BUG] (not sure it is a bug)

[flamariond]

Describe the bug
Fitting seems to be inadequate for a p(R1,C1) circuit with large values of R (eg 1e+9) e small values of C (eg 1e-12)

To Reproduce
Steps to reproduce the behavior:

1. I have a synthetic data for a p(R,C) circuit in the frequency range of 10^5 Hz to 1 Hz
2. impedance.py does not fit it. It seems to hold constant one of the parameters.

Expected behavior
Since it is a synthetic data, fit should be perfect.

Additional context
I have been using this excellent package for a couple of days, and found this difficulty trying to fit data obtained from a painted metallic surface on NaCl 3.5% (it is a corrosion study), with these high values of R and small values of C.
Congratulations for this excellent software.

[mdmurbach]

Hi @flamariond, thanks! Would you be able to share the code you have to reproduce this?