GaussianWindow

GaussianWindow[x]

represents a Gaussian window function of x.

GaussianWindow[x,σ]

uses standard deviation σ.

Details

Examples

open allclose all

Basic Examples  (3)

Shape of a 1D Gaussian window:

Shape of a 2D Gaussian window:

Extract the continuous function representing the Gaussian window:

Parameterized Gaussian window:

Scope  (6)

Shape of a 1D Gaussian window using a specified standard deviation:

Variation of the shape as a function of the parameter σ:

Translated and dilated Gaussian window:

2D Gaussian window with a circular support:

Evaluate numerically:

Discrete Gaussian window of length 15:

Discrete 15×10 2D Gaussian window:

Applications  (3)

Create a moving average filter of length 11:

Smooth the filter using a Gaussian window:

Log-magnitude plot of the frequency spectrum of the filters:

Use a window specification to calculate sample PowerSpectralDensity:

Calculate the spectrum:

Compare to spectral density calculated without a windowing function:

The plot shows that window smooths the spectral density:

Compare to the theoretical spectral density of the process:

Use a window specification for time series estimation:

Specify window for spectral estimator:

Properties & Relations  (3)

GaussianWindow[x,] is equivalent to a Dirichlet window:

The area under the Gaussian window:

Normalize to create a window with unit area:

Fourier transform of the Gaussian window:

Power spectrum of the Gaussian window:

Possible Issues  (1)

2D sampling of Gaussian window will use a different standard deviation for each row of samples when passed as a symbol to Array:

Use a pure function instead:

Introduced in 2012
 (9.0)