 Usage:  yh = xgobineunet(x,y,g,hidden)  
 
 Input:

  x                      n x 1 matrix 
                         
  y                      n x 1 matrix 
                         
  g                      n x 1 matrix with integers starting at zero 
                         
  hidden                 scalar number of hidden units 
                         
 Output:

  yh                     n x 1 matrix smoothed fit 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
