single

Cast coefficients of digital filter to single precision

Syntax

f2 = single(f1)

Description

f2 = single(f1) casts coefficients in a digital filter, f1, to single precision and returns a new digital filter, f2, that contains these coefficients. This is the only way that you can create single-precision digitalFilter objects.

Examples

Lowpass FIR Filter in Double and Single Precision

Use designfilt to design a 5th-order FIR lowpass filter. Specify a normalized passband frequency of $$0.2\pi$$ rad/sample and a normalized stopband frequency of $$0.55\pi$$ rad/sample. Cast the filter coefficients to single precision.

format long
d = designfilt('lowpassfir','FilterOrder',5, ...
               'PassbandFrequency',0.2,'StopbandFrequency', 0.55);
e = single(d);
classd = class(d.Coefficients)

classd = 
'double'

classe = class(e.Coefficients)

classe = 
'single'

Input Arguments

f1 — Digital filter

digitalFilter object

Digital filter, specified as a digitalFilter object. Use designfilt to generate f1 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

f2 — Single-precision digital filter

digitalFilter object

Single-precision digital filter, returned as a digitalFilter object.