Inverse z-transform.
Syntax
f = iztrans(F)
f = iztrans(F,k)
f = iztrans(F,w,k)
Description
f = iztrans(F) is the inverse z-transform of the scalar symbolic object F with default independent variable z. The default return is a function of n:
where R is a positive number chosen so that the function F(z) is analytic on and outside the circle |z| = R
If F = F(n), iztrans returns a function of k:
f = iztrans(F,k) makes f a function of k instead of the default n. Here k is a scalar symbolic object.
f = iztrans(F,w,k) takes F to be a function of w instead of the default findsym(F) and returns a function of k:
Examples
Inverse Z-Transform |
MATLAB Operation |
|
f = 2*z/(z-2)^2
iztrans(f)
returns
2^n*n |
|
g = n*(n+1)/(n^2+2*n+1)
iztrans(g)
returns
(-1)^k
|
|
f = z/(z-a)
iztrans(f,k)
returns
a^k
|
|
f = x*(x-exp(z))/
(x^2-2*x*exp(z)+exp(2*z))
iztrans(f,x,k)
returns exp(z)^k |
See Also
ifourier, ilaplace, ztrans
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