Download Wavelet Toolbox User's Guide

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Product Overview
Wavelets: A New Tool for Signal Analysis
Product Overview
Everywhere around us are signals that can be analyzed. For example, there are
seismic tremors, human speech, engine vibrations, medical images, financial
data, music, and many other types of signals. Wavelet analysis is a new and
promising set of tools and techniques for analyzing these signals.
Wavelet Toolbox™ software is a collection of functions built on the MATLAB®
technical computing environment. It provides tools for the analysis and
synthesis of signals and images, and tools for statistical applications, using
wavelets and wavelet packets within the framework of MATLAB.
The MathWorks™ provides several products that are relevant to the kinds of
tasks you can perform with the toolbox. For more information about any of
these products, see the products section of The MathWorks Web site.
Wavelet Toolbox software provides two categories of tools:
The second category of tools is a collection of graphical interface tools that
afford access to extensive functionality. Access these tools from the command
line by typing
wavemenu
Note The examples in this guide are generated using Wavelet Toolbox
software with the DWT extension mode set to 'zpd' (for zero padding), except
when it is explicitly mentioned. So if you want to obtain exactly the same
numerical results, type dwtmode('zpd'), before to execute the example code.
In most of the command-line examples, figures are displayed. To clarify the
presentation, the plotting commands are partially or completely omitted. To
reproduce the displayed figures exactly, you would need to insert some
graphical commands in the example code.
• Command-line functions
• Graphical interactive tools
The first category of tools is made up of functions that you can call directly from
the command line or from your own applications. Most of these functions are
M-files, series of statements that implement specialized wavelet analysis or
synthesis algorithms. You can view the code for these functions using the
following statement:
type function_name
You can view the header of the function, the help part, using the statement
help function_name
A summary list of the Wavelet Toolbox functions is available to you by typing
help wavelet
You can change the way any toolbox function works by copying and renaming
the M-file, then modifying your copy. You can also extend the toolbox by adding
your own M-files.
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