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freqz

System object: dsp.IIRFilter
Package: dsp

Frequency response

Syntax

[h,w] = freqz(H)
[h,w] = freqz(H,n)
[h,w] = freqz(H,Name,Value)
freqz(H)

Description

[h,w] = freqz(H) returns the complex, 8192–element frequency response vector h, and the corresponding frequencies w in radians/sample.

[h,w] = freqz(H,n) returns the complex, n-element frequency response vector h, and the corresponding frequencies w in radians/sample, using n samples.

[h,w] = freqz(H,Name,Value) returns the frequency response and the corresponding frequencies, with additional options specified by one or more Name, Value pair arguments.

freqz(H) uses FVTool to plot the magnitude and unwrapped phase of the frequency response of the filter System object™ H.

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