isfir
Verify if filter System object is FIR
Syntax
Description
determines whether the filter System object™ is an FIR filter. If the filter is an FIR filter, flag
= isfir(sysobj
)isfir
returns 1
.
To determine whether sysobj
is an FIR filter, the
isfir
function inspects if the filter in the transfer function form
has a scalar denominator. If it does, it is an FIR filter.
Examples
Determine if Filter is FIR
Design a Lowpass FIR Filter.
d = fdesign.lowpass; h = design(d,Systemobject=true)
h = dsp.FIRFilter with properties: Structure: 'Direct form' NumeratorSource: 'Property' Numerator: [-0.0024 -0.0021 0.0068 0.0167 0.0111 -0.0062 -0.0084 0.0093 0.0130 -0.0101 -0.0183 0.0114 0.0262 -0.0125 -0.0380 0.0134 0.0582 -0.0140 -0.1027 0.0145 0.3172 0.4854 0.3172 0.0145 -0.1027 -0.0140 0.0582 0.0134 ... ] (1x43 double) InitialConditions: 0 Use get to show all properties
Determine if the filter is an FIR filter using the isfir
function.
isfir(h)
ans = logical
1
isfir
returns 1 to indicate that the filter is an FIR filter.
Input Arguments
sysobj
— Input filter
filter System object
Output Arguments
flag
— Flag to determine whether filter is FIR
1
| 0
Flag to determine whether the filter is FIR, returned as a logical scalar. If the
filter is FIR, isfir
returns a logical 1
, else
it returns a logical 0
.
Data Types: logical
Version History
Introduced in R2011aR2024b: Support for dsp.VariableFIRDecimator
and dsp.VariableFIRInterpolator
Objects
Starting in R2024b, the isfir
analysis function supports the
dsp.VariableFIRDecimator
and dsp.VariableFIRInterpolator
objects.
R2024b: dsp.BiquadFilter
object warns
The dsp.BiquadFilter
object issues a warning and will be removed in a
future release. Use the dsp.SOSFilter
object
instead. For more information on how to replace your existing code, see the
Compatibility Considerations section in the dsp.BiquadFilter
reference page.
R2024b: Support for dsp.DCBlocker
object
Starting in R2024b, this function supports the dsp.DCBlocker
object.
R2023b: Support for dsp.ParallelFilter
and dsp.Delay
Objects
Starting in R2023b, the isfir
analysis function supports the
dsp.ParallelFilter
and the dsp.Delay
objects.
R2023b: dsp.BiquadFilter
object will be removed
The dsp.BiquadFilter
object will be removed in a future release. Use
the dsp.SOSFilter
object
instead.
Comando MATLAB
Hai fatto clic su un collegamento che corrisponde a questo comando MATLAB:
Esegui il comando inserendolo nella finestra di comando MATLAB. I browser web non supportano i comandi MATLAB.
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)