freqspace() - Signal Processing

freqspace returns the implied
frequency range for equally spaced frequency responses. freqspace is
useful when creating desired frequency responses for various one-
and two-dimensional applications.[f1,f2] = freqspace(n) returns
the two-dimensional frequency vectors f1 and f2 for
an n-by-n matrix.For n odd, both f1 and f2 are [-n+1:2:n-1]/n.For n even, both f1 and f2 are [-n:2:n-2]/n.[f1,f2] = freqspace([m n]) returns
the two-dimensional frequency vectors f1 and f2 for
an m-by-n matrix.[x1,y1] = freqspace(...,'meshgrid') is
equivalent to[f1,f2] = freqspace(...);
[x1,y1] = meshgrid(f1,f2);f = freqspace(N) returns
the one-dimensional frequency vector f assuming N evenly
spaced points around the unit circle. For N even
or odd, f is (0:2/N:1). For N even, freqspace therefore
returns (N+2)/2 points. For N odd,
it returns (N+1)/2 points.f = freqspace(N,'whole') returns N evenly
spaced points around the whole unit circle. In this case, f is 0:2/N:2*(N-1)/N.

Syntax

[f1,f2] = freqspace(n)[f1,f2] = freqspace([m n])[x1,y1] = freqspace(...,'meshgrid')f = freqspace(N)f = freqspace(N,'whole')

Example

[f1,f2] = freqspace(...);
[x1,y1] = meshgrid(f1,f2);

Output / Return Value

Limitations

Alternatives / See Also

Reference