User`s guide

5 Model Analysis Tools
5-14
several LTI models on a single plot. To do so, invoke the corresponding
command line function using the list
sys1,..., sysN of models as the inputs.
step(sys1,sys2,...,sysN)
impulse(sys1,sys2,...,sysN)
...
bode(sys1,sys2,...,sysN)
nichols(sys1,sys2,...,sysN)
...
All models in the argument lists of any of the response plotting functions
(except for
sigma) must have the same number of inputs and outputs. To
differentiate the plots easily, you can also specify a distinctive color/linestyle/
marker for each system just as you would wit h the
plot command. For
example,
bode(sys1,’r’,sys2,’y--’,sys3,’gx’)
plots sys1 with solid red lines, sys2 with yellow dashed lines, and sys3 with
green
x markers.
You can plot responses of multiple modelso n the same plot. These models need
not be all continuous-time or all discrete-time.