 Usage:  h = kaplanmeier(y {,intervals {,disp}})  
 
 Input:

  y                      n x 2 matrix 
                         
  intervals              vector 
                         
  disp                   constant 
                         
 Output:

  h                      vector 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
