Signal Processing Toolbox

wvtool

Window Visualization Tool

Syntax

• wvtool(winname(n))
  wvtool(winname1(n),winname2(n),...winnamem(n))
  wvtool(w)
  h = wvtool(...)
  

Description

wvtool(winname(n)) opens WVTool with the time and frequency domain plots of the n-length window specified in winname, which can be any window in the Signal Processing Toolbox. For a list of valid window names, see the window function. In the wvtool command, do not precede the window name with @.

wvtool(winname1(n),winname2(n),...winnamem(n)) opens WVTool with a time-domain plot and a frequency-domain plot that contain all the windows specified in winname₁,...winname_m. The plots are shown on the same axes so that window characteristics can be compared and contrasted easily. WVTool is useful for displaying, annotating, and printing window responses.

wvtool(w) launches the Window Visualization Tool with sigwin object w.

h = wvtool(...) returns the Handle Graphics figure handle h.

Note    A related tool, wintool, is available for designing and analyzing windows.

The WVTool toolbar buttons in order from left to right are Print, Print Preview, Edit plot, Add text, Add arrow, Add line, Zoom, Legend, and What's This Help.

Note    If you launch WVTool from FDATool, an Add/Replace icon, which controls how new windows are added from FDATool, appears on the toolbar.

WinTool Menus

In addition to the usual menus items, wintool contains these wintool-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.
• Copy options--diplays the Preferences dialog box.
• 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.
• Frequency specifications--controls the sampling frequency. Available units are Normalized (0 to 1), Hz, kHz, MHz, and GHz. If you select any unit except Normalized, you can a frequency value or the name of the MATLAB workspace vector that contains the desired frequency in the Fs field.

  

• You can also access the frequency specifications by right-clicking on the x-axis label of either plot.

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.

Examples

Compare Hamming, Hann, and Gaussian windows:

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

See Also

fdatool, window, wintool

wintool

xcorr

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