[Hama Wiki] Trivial Update of "TraditionalCollaborativeFiltering" by udanax

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The following page has been changed by udanax:
http://wiki.apache.org/hama/TraditionalCollaborativeFiltering

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    public static void main(String[] args) {
      HamaConfiguration conf = new HamaConfiguration();
      
-     Matrix tmpMatrix = new Matrix(conf, "input");
+     Matrix userByItem = new Matrix(conf, "input");
      
      // Build an user by item matrix 
      for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
-         tmpMatrix.set(i, j, data[i][j]);
+         userByItem.set(i, j, data[i][j]);
        }
      }
  
      // Get the pair set of all row key combinations
      Combination x = new Combination(data.length, 2);
      
-     // Calculate |a|·|b|cos(q)
+     // |a|·|b|cos(q) calculation
      while (x.hasMore()) {
        int[] pair = x.getNext();
        System.out.print("Similarity: (" + pair[0] + ", " + pair[1] + ") = ");
  
-       Vector v1 = tmpMatrix.getRow(pair[0]);
+       Vector v1 = userByItem.getRow(pair[0]);
-       Vector v2 = tmpMatrix.getRow(pair[1]);
+       Vector v2 = userByItem.getRow(pair[1]);
        double similarity = v1.dot(v2);
  
-       // Collect result
+       // Collect the similarity result of the two users
        System.out.println(similarity);
      }