 Usage:  {bn1, bn2} = hardauto (b1, b2, x)  
 
 Input:

  b1                     n x 3 array, mother wavelet coefficients 
                         
  b2                     n x 3 array, mother wavelet coefficients 
                         
  x                      m x 1 array, input data 
                         
 Output:

  bn1                    n x 3 array, thresholded mother wavelet coefficients 
                         
  bn2                    n x 3 array, thresholded mother wavelet coefficients 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
