wlet   Linux PC

PURPOSE ^

Forward and Inverse Fast Wavelet Transforms

DESCRIPTION ^

 Forward and Inverse Fast Wavelet Transforms

 Usage:
   output = wlet( signal, [output_type [, num_coeff [, direction]]])


   Parameters:

      output_type is one of:

         1  Output is one dimensional, and represents the raw result 
            from the fast wavelet transform algorithm (wavelet coefficients).
            This is the default.
            

         2  Output is two dimensional. This output format is convenient for
           displaying transformed data as a time-scale matrix (scalogram).

      num_coeff 
       
         gives the number of filter coeffients used in approximating
         the wavelet.  Possible values are 4, 12 or 20, and the default is 20.

      direction 

         1  Transform is forward, from time domain to time-scale
         domain. (default)

        -1  Transform is reverse, from time-scale domain to time domain.


 Two dimensional output can only be used with the forward transform, and
 the input to both forward and reverse transforms must be one-dimensional.

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