This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.


Hann (Hanning) window


w = hann(L)
w = hann(L,sflag)



w = hann(L) returns an L-point symmetric Hann window.

w = hann(L,sflag) returns a Hann window using the window sampling specified by sflag.


collapse all

Create a 64-point Hann window. Display the result using wvtool.

L = 64;

Input Arguments

collapse all

Window length, specified as a positive integer.

Data Types: single | double

Window sampling, specified as one of the following:

  • 'symmetric' — Use this option when using windows for filter design.

  • 'periodic' — This option is useful for spectral analysis because it enables a windowed signal to have the perfect periodic extension implicit in the discrete Fourier transform. When 'periodic' is specified, hann computes a window of length L + 1 and returns the first L points.

Output Arguments

collapse all

Hann window, returned as a column vector.


The following equation generates the coefficients of a Hann window:


The window length L = N + 1.


[1] Oppenheim, Alan V., Ronald W. Schafer, and John R. Buck. Discrete-Time Signal Processing. Upper Saddle River, NJ: Prentice Hall, 1999.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Introduced before R2006a