zgrid(1)

NAME
zgrid - zgrid plot

CALLING SEQUENCE
zgrid()

DESCRIPTION
plots z-plane grid lines: lines of constant damping factor (zeta) and natural frequency (Wn) are drawn in within the unit Z-plane circle.

Iso-frequency curves are shown in frequency*step on the interval [0,0.5]. Upper limit corresponds to Shannon frequency ( 1/dt > 2*f ).

SEE ALSO
frdmp, frdmp2tf, frep2tf, freson