Specifications

set
16-192
However, if you change the Variable to 'z^-1' (or 'q')by
set(h,'Variable','z^-1'),
the same command
set(h,'num',[1 2],'den',[1 3 4])
now interprets the row vectors [1 2] and [1 3 4] as the polynomials
and and produces:
Note Because the resulting transfer functions are different, make sureto use
the convention consistent with your choice of variable.
See Also get Access/query LTI model properties
frd Specify a frequency response data model
ss Specify a state-space model
tf Specify a transfer function
zpk Specify a zero-pole-gain model
hz
()
z 2+
z
2
3z 4++
----------------------------
=
12z
1–
+
13z
1–
4z
2–
++
hz
1–
()
12z
1–
+
13z
1–
4z
2–
++
----------------------------------------
zh z
()
==