### 9. z-Transforms Demos - MATLAB 3

PeZ (pezdemo) is a MATLAB tool for pole/zero manipulation. Poles and zeros can be placed anywhere on a map of the $$z$$-plane. The corresponding time domain ($$n$$) and frequency domain ($$\hat\omega$$) plots will be displayed. When a zero pair (or pole pair) is dragged, the impulse response and frequency response plots will be updated in real time.
The connection between the Z-transform domain of poles and zeros and the time domain, and also the frequency domain is illustrated with several movies where individual zeros or zero pairs are moved continuously.
A demo that illustrates the connection between the complex $$z$$-plane and the frequency response of a system. The frequency response is obtained by evaluating $$H(z)$$ on the unit circle in the complex $$z$$-plane.