 Usage:  y = qff (x, d1, d2)   

 

 Input:



  x                      array 

                         

  d1                     array or scalar 

                         

  d2                     array or scalar 

                         

                         

 Output:



  y                      array 

                         

                         

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(C) MD*TECH Method and Data Technologies, 21.9.2000

