 Usage:  sm=supsmo(xy)  
 
 Input:

  xy                     n x 2, the data. In the first column the 
                         independent, in the second column the 
                         dependent variable. 
                         
 Output:

  sm                     n x 2 matrix, the first column is the independent 
                         variable xy[,1] and the second column contains the 
                         fitted values. 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
