Interpretation of ferromagnetic resonance experimental results by cross-validation of solutions of the Smit-Beljers equation

•The research is a new approach to analyze ferromagnetic resonance experimental data.•It is based on some machine learning procedures.•It recognizes the role of the demagnetizing tensor.•It gives values of all magnetocrystalline constants, the value of g-factor and the value of saturation magnetization of the sample under investigation.