MATLAB code for analysis of variance (ANOVA) applied to electrochemical impedance spectroscopy (EIS) data, including an EIS dataset from four NCA 21700 cells with 9 SoC and 3 temperature levels.

This repository provides MATLAB code for applying analysis of variance (ANOVA) to electrochemical impedance spectroscopy (EIS) data. ANOVA is performed on the real part, imaginary part, magnitude, and phase of the impedance across the full frequency range, as well as on the intercept frequency and its corresponding real impedance value. For all impedance components, the effect size (ES) is quantified using omega-squared formulations. The script outputs a structured MATLAB variable containing ANOVA and ES results, ES-based rankings for each independent variable, and figures illustrating Nyquist plots and frequency-dependent ES.