dbwavf

R2026b

Daubechies wavelet filter

Syntax

f = dbwavf(wname)

Description

f = dbwavf(wname) returns the scaling filter associated with the Daubechies wavelet specified by wname. f is a real-valued vector.

Examples

Scaling Filter Associated With Daubechies Wavelet

Specify the order 4 Daubechies wavelet.

wname = 'db4';

Compute the corresponding scaling filter.

f = dbwavf(wname);
f'

ans = 8×1

    0.1629
    0.5055
    0.4461
   -0.0198
   -0.1323
    0.0218
    0.0233
   -0.0075

Input Arguments

wname — Daubechies wavelet

'dbN'

Daubechies wavelet with N vanishing moments, where N is a positive integer in the closed interval [1, 45].

Extended Capabilities

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

The dbwavf function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Version History

Introduced before R2006a

R2026b: Use thread-based environments

You can use dbwavf in thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.