 Usage:  h = conting (x, y)  
 
 Input:

  x                      n x 1 matrix partition of n points into k clusters 
                         
  y                      n x 1 matrix partition of n points into l clusters 
                         
 Output:

  h                      k x l contingency table 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
