 Usage:  {a, b} = fwt (x, l, h)  
 
 Input:

  x                      n x 1 vector, input data where n has to be a power of 2 
                         
  l                      integer, number of father wavelet coefficients 
                         
  h                      m x 1 vector, wavelet basis 
                         
 Output:

  a                      l x 2 matrix, indices and coefficients of the father wavelets 
                         
  b                      (n-l) x 3 matrix, indices and coefficients of the mother wavelets 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
