freqz2
2-D frequency response
Syntax
Description
[
returns H
,f1
,f2
] = freqz2(h
)H
, the 64
-by-64
frequency response of h
, and the frequency vectors
f1
(of length 64
) and
f2
(of length 64
). h
is
a two-dimensional FIR filter, in the form of a computational molecule.
freqz2
returns f1
and f2
as normalized frequencies in the range -1.0 to 1.0, where 1.0 corresponds to half
the sampling frequency, or π radians.
[
returns the frequency response for the FIR filter H
,f1
,f2
] = freqz2(h
,f1, f2
)h
at frequency
values in f1
and f2
. These frequency values
must be in the range -1.0 to 1.0, where 1.0 corresponds to half the sampling
frequency, or π radians. You can also specify [f1 f2]
as two
separate arguments, f1, f2
.
[___] = freqz2(h,___,
uses [dx dy]
)[dx dy]
to override the intersample spacing in
h
. You can also specify a scalar to specify the same spacing
in both the x and y dimensions.
freqz2(___)
produces a mesh plot of the
two-dimensional magnitude frequency response when no output arguments are
specified.
Examples
Input Arguments
Output Arguments
Version History
Introduced before R2006a