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Description:
Constructs polar plots and Nyquist stability plots for system functions, and examines how the plots can be used to design stable systems. The polar plot example includes the method for drawing a contour of constant closed-loop magnitude. The Nyquist plot example shows a transfer function with one pole on the imaginary axis.
Thanks man. I'm doing this as well but your file defo helps. I used the chart app instead of X-Y plots. Have a look.