 
Summary: Some Useful Matlab and Control Systems Toolbox Functions
Creating and converting linear models
tf  Create (or convert to) a transfer function model.
zpk  Create (or convert to) a zero/pole/gain model.
ss  Create (or convert to) a statespace model.
feedback  Feedback connection of two systems.
c2d  Continuous to discrete conversion.
d2c  Discrete to continuous conversion.
Model analysis
dcgain  D.C. (low frequency) gain.
bandwidth  System bandwidth.
pole, eig  System poles.
zero  System zeros.
pzmap  Polezero map.
damp  Natural frequency and damping of system poles.
ltiview  Response analysis GUI (LTI Viewer).
step  Step response.
impulse  Impulse response.
lsim  Response to arbitrary inputs.
bode  Bode diagrams of the frequency response.
