control.matlab
tf ss frd rss drss
mag2db db2mag c2d ss2tf tf2ss tfdata
series parallel feedback negate connect append
dcgain pole zero damp pzmap
step impulse initial lsim
bode nyquist nichols margin freqresp evalfr
rlocus sisotool place lqr
rss drss ctrb obsv gram
minreal hsvd balred modred era markov
pade
lyap dlyap care dare
gangof4 unwrap
~numpy.linspace ~numpy.logspace ~scipy.signal.ss2zpk ~scipy.signal.tf2zpk ~scipy.signal.zpk2ss ~scipy.signal.zpk2tf