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WVTool

Open Window Visualization Tool

Description

Window Visualization Tool is an interactive tool that enables you to visualize time and frequency domain plots of the window vector. You can generate window vectors for a number of common window functions using the Signal Processing Toolbox™ software. See window for a list of supported window functions.

Note

A related tool, Window Designer, is available for designing and analyzing windows.

Open the WVTool

WVTool can be opened programmatically using one of the methods described in Programmatic Use.

Examples

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Display and Compare Windows

Open Live Script

Use wvtool to display and compare 64-point Hamming, Hann, and Gaussian windows.

wvtool(hamming(64),hann(64),gausswin(64))

$Figure Window Visualization Tool contains 2 axes objects and other objects of type uimenu, uitoolbar, uipanel. Axes object 1 with title Time domain, xlabel Samples, ylabel Amplitude contains 3 objects of type line. Axes object 2 with title Frequency domain, xlabel Normalized Frequency (\times\pi rad/sample), ylabel Magnitude (dB) contains 3 objects of type line.$

Compare 128-point Kaiser windows with different values of $β$ .

wvtool(kaiser(128,1.5),kaiser(128,4.5))

$Figure Window Visualization Tool contains 2 axes objects and other objects of type uimenu, uitoolbar, uipanel. Axes object 1 with title Time domain, xlabel Samples, ylabel Amplitude contains 2 objects of type line. Axes object 2 with title Frequency domain, xlabel Normalized Frequency (\times\pi rad/sample), ylabel Magnitude (dB) contains 2 objects of type line.$

Programmatic Use

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`wvtool(WindowVector)`

wvtool(WindowVector) opens the Window Visualization Tool (WVTool) with time and frequency domain plots of the window vector specified in WindowVector. WindowVector must be a real-valued row or column vector. By default, the frequency domain plot is the magnitude squared of the Fourier transform of the window vector in decibels (dB). You can generate window vectors for a number of common window functions using the Signal Processing Toolbox software. See window for a list of supported window functions.

`wvtool(WindowVector1,...,WindowVectorN)`

wvtool(WindowVector1,...,WindowVectorN) opens WVTool with time and frequency domain plots of the window vectors specified in WindowVector1, …, WindowVectorN.

`H = wvtool(...)`

H = wvtool(...) returns the figure handle, H.

More About

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WVTool Menus

In addition to the usual menu items, wvtool contains these wvtool-specific menu commands:

File menu:

Export — Exports the displayed plot(s) to a graphic file.

Edit menu:

Copy figure — Copies the displayed plot(s) to the clipboard (available only on Windows platforms).
Copy options — Displays the Preferences dialog box (available only on Windows platforms).
Figure, Axes, and Current Object Properties — Displays the Property Editor.

View menu:

Time domain — Check to show the time domain plot.
Frequency domain — Check to show the frequency domain plot.
Legend — Toggles the window name legend on and off. This option is also available with the Legend toolbar button.
Analysis Parameters — Controls the response plot parameters, including number of points, range, x- and y-axis units, sampling frequency, and normalized magnitude.
You can also access the Analysis Parameters by right-clicking the x-axis label of a plot in the Window Viewer panel.
Insert menu:

You use the Insert menu to add labels, titles, arrows, lines, text, and axes to your plots.

Tools menu:

Edit Plot — Turns on plot editing mode
Zoom In — Zooms in along both x- and y-axes.
Zoom X — Zooms in along the x-axis only. Drag the mouse in the x direction to select the zoom area.
Zoom Y — Zooms in along the y-axis only. Drag the mouse in the y direction to select the zoom area.
Full View — Returns to full view.