ZPLANE Zero-pole plot

Section: Handle-Based Graphics


This function makes a zero-pole plot of a discrete-time system defined by its zeros and poles. The various syntaxes are

where z and p are the zeros and the poles of the system stored as column vectors, or


where a and b are the polynomial coefficients of the numerator and denominator stored as line vectors (roots is used to find the zeros and poles). The symbol 'o' represents a zero and the symbol 'x' represents a pole. The plot includes the unit circle for reference. Contributed by Paulo Xavier Candeias under GPL