info
Information about digital filter
Syntax
Description
Examples
Information on a Lowpass FIR Filter
Design a lowpass FIR filter with normalized passband frequency rad/sample and normalized stopband frequency rad/sample. Obtain information about the filter just designed.
d = designfilt('lowpassfir','PassbandFrequency',0.4,'StopbandFrequency',0.45); s = info(d)
s = 17x44 char array
'FIR Digital Filter (real) '
'------------------------- '
'Filter Length : 81 '
'Stable : Yes '
'Linear Phase : Yes (Type 1) '
' '
'Design Method Information '
'Design Algorithm : Equiripple '
' '
'Design Specifications '
'Sample Rate : N/A (normalized frequency)'
'Response : Lowpass '
'Specification : Fp,Fst,Ap,Ast '
'Stopband Edge : 0.45 '
'Passband Ripple : 1 dB '
'Stopband Atten. : 60 dB '
'Passband Edge : 0.4 '
Input Arguments
d
— Digital filter
digitalFilter
object
Digital filter, specified as a digitalFilter
object. Use designfilt
to generate a digital filter
based on frequency-response specifications.
Example: d =
designfilt('lowpassiir','FilterOrder',3,'HalfPowerFrequency',0.5)
specifies a third-order Butterworth filter with normalized 3 dB frequency 0.5π
rad/sample.
Output Arguments
s
— Information table
character array
Information table, returned as a character array.
Version History
See Also
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