Three dimensional perspective plotting and fitting of immittance data
Abstract Three dimensional perspective plotting of impedance or admittance data illustrates directly the interdependencies between the three variables: real part, imaginary part, and frequency. In addition, the three planar projections included show the associated three relationships between any two of these variables. We illustrate the usefulnes and versatility of such plotting for synthetic data derived from given equivalent circuits and for data obtained from measurements on lumped-constant circuits and on ionic conductors. The utility of nonlinear complex least squares data fitting is demostrated by a 3-D plot which compares both the original data and calculated “data” obtained from the fitting results.