Find capacitance from nonlinear I-V curves

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To extract capacitance and resistance from nonlinear I-V curves, time-axis data is necessary. The nonlinear characteristics of the circuit element complicate direct analysis from the I-V curve alone. Participants suggest using specific equations to fit the data, but emphasize that without time-dependent measurements, accurate capacitance extraction is not feasible. Overall, time data is crucial for a reliable assessment of the element's capacitance. Accurate modeling requires both I-V curves and time-domain analysis.
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I have some experimental circuit element that exhibits both resistance and capacitance, and results in nonlinear I-V curves.
can i extract capacitance and resistance of this element just from the I-V curve? or do I need time-axis data?
a suggestion on what equation to use to fit this data? thanks.
 
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you need time data to measure capacitance
 

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