How to draw sheperd diagram ?

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Friday Ameh

Shepherd's diagram steps :

1. Plot poles and zeros on a complex plane.

2. Draw contours of constant magnitude (gain) and phase angle.

3. Label axes (real and imaginary).

4. Identify stability and performance characteristics.

5. Analyze diagram for insights into system behavior.

Swathy P Sadanandan

Is there any application for drawing this diagram ?