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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1628) Persian Analyzer
Date Sun, 03 May 2009 17:03:30 GMT
Persian Analyzer
----------------

                 Key: LUCENE-1628
                 URL: https://issues.apache.org/jira/browse/LUCENE-1628
             Project: Lucene - Java
          Issue Type: New Feature
          Components: contrib/analyzers
            Reporter: Robert Muir
            Priority: Minor


A simple persian analyzer.

i measured trec scores with the benchmark package below against http://ece.ut.ac.ir/DBRG/Hamshahri/
:

SimpleAnalyzer:
SUMMARY
  Search Seconds:         0.012
  DocName Seconds:        0.020
  Num Points:           981.015
  Num Good Points:       33.738
  Max Good Points:       36.185
  Average Precision:      0.374
  MRR:                    0.667
  Recall:                 0.905
  Precision At 1:         0.585
  Precision At 2:         0.531
  Precision At 3:         0.513
  Precision At 4:         0.496
  Precision At 5:         0.486
  Precision At 6:         0.487
  Precision At 7:         0.479
  Precision At 8:         0.465
  Precision At 9:         0.458
  Precision At 10:        0.460
  Precision At 11:        0.453
  Precision At 12:        0.453
  Precision At 13:        0.445
  Precision At 14:        0.438
  Precision At 15:        0.438
  Precision At 16:        0.438
  Precision At 17:        0.429
  Precision At 18:        0.429
  Precision At 19:        0.419
  Precision At 20:        0.415

PersianAnalyzer:
SUMMARY
  Search Seconds:         0.004
  DocName Seconds:        0.011
  Num Points:           987.692
  Num Good Points:       36.123
  Max Good Points:       36.185
  Average Precision:      0.481
  MRR:                    0.833
  Recall:                 0.998
  Precision At 1:         0.754
  Precision At 2:         0.715
  Precision At 3:         0.646
  Precision At 4:         0.646
  Precision At 5:         0.631
  Precision At 6:         0.621
  Precision At 7:         0.593
  Precision At 8:         0.577
  Precision At 9:         0.573
  Precision At 10:        0.566
  Precision At 11:        0.572
  Precision At 12:        0.562
  Precision At 13:        0.554
  Precision At 14:        0.549
  Precision At 15:        0.542
  Precision At 16:        0.538
  Precision At 17:        0.533
  Precision At 18:        0.527
  Precision At 19:        0.525
  Precision At 20:        0.518



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