Importing and Exporting Information

The Continuous Wavelet 1-D tool lets you import information from and export information to disk.

You can

Load signals from disk into the Continuous Wavelet 1-D tool.
Save wavelet coefficients from the Continuous Wavelet 1-D tool to disk.

Loading Signals

To load a signal you have constructed in your MATLAB^® workspace into the Continuous Wavelet 1-D tool, save the signal in a MAT-file (with extension mat or other).

For instance, suppose you've designed a signal called warma and want to analyze it in the Continuous Wavelet 1-D tool.

save warma warma

The workspace variable warma must be a vector.

sizwarma = size(warma)

sizwarma =
           1     1000

To load this signal into the Continuous Wavelet 1-D tool, use the menu option File > Load Signal. A dialog box appears that lets you select the appropriate MAT-file to be loaded.

Note

The first one-dimensional variable encountered in the file is considered the signal. Variables are inspected in alphabetical order.

Saving Wavelet Coefficients

The Continuous Wavelet 1-D tool lets you save wavelet coefficients to disk. The toolbox creates a MAT-file in the current folder with the extension wc1 and a name you give it.

To save the continuous wavelet coefficients from the present analysis, use the menu option File > Save > Coefficients.

A dialog box appears that lets you specify a folder and filename for storing the coefficients.

Consider the example analysis:

File > Example Analysis > with haar at scales [1:1:64] → Cantor curve.

After saving the continuous wavelet coefficients to the file cantor.wc1, load the variables into your workspace:

load cantor.wc1 -mat
whos

Name	Size	Bytes	Class
`coefs`	`64x2188`	`1120256`	`double array`
`scales`	`1x64`	`512`	`double array`
`wname`	`1x4`	`8`	`char array`

Variables coefs and scales contain the continuous wavelet coefficients and the associated scales. More precisely, in the above example, coefs is a 64-by-2188 matrix, one row for each scale; and scales is the 1-by-64 vector 1:64. Variable wname contains the wavelet name.