[TR-223] Refactoring/Cleaning up of the package org.terrier.matching.models Created: 18/Dec/12  Updated: 31/Mar/14  Resolved: 31/Mar/14

Status: Resolved
Project: Terrier Core
Component/s: .matching
Affects Version/s: 3.5
Fix Version/s: 3.6

Type: Improvement Priority: Major
Reporter: Francois Rousseau Assignee: Craig Macdonald
Resolution: Fixed  
Labels: None

Attachments: Text File TR-223.patch    

 Description   
There are some inconsistencies in the package org.terrier.matching.models:
- style guide rules (lines too long, empty lines full of tabs, unreadable score definitions)
- final methods that prevent inheritance (BM25, TF_IDF)
- missing library to standardize tf normalizations (sublinearity, length normalization...)
- log definition in the Idf class that should be deprecated and moved to the new library

 Comments   
Comment by Francois Rousseau [ 18/Dec/12 ]

Patch related to the issue. Aiming at version 4.0

ant test passes successfully.

MAP on disks 4&5 (same as current version 3.5) for:

  • BB2 (0.2412) c=1.0
  • BM25 (0.2502) c=0.3444
  • DFI0 (0.2390)
  • DFR_BM25 (0.2043) c=0.3444
  • DFRee (0.2488)
  • DirichletLM (0.2324) mu=2500
  • DLH (0.2368)
  • DLH13 (0.2437)
  • DPH (0.2479)
  • Hiemstra_LM (0.2167) c=0.15
  • IFB2 (0.2400) c=1.0
  • In_expB2 (0.2408) c=1.0
  • In_expC2 (0.2336) c=1.0
  • InB2 (0.2392) c=1.0
  • InL2 (0.2405) c=1.0
  • Js_KLs (0.2504)
  • LemurTF_IDF (0.2273)
  • LGD (0.2484) c=1.0
  • PL2 (0.2538) c=9.15
  • TF-IDF (0.2508) c=0.3444
  • XSqrA_M (0.2477)
Comment by Francois Rousseau [ 07/Jan/13 ]

New patch. For the tf normalizations's library, it's actually concave and not sublinear that we want.

Comment by Richard McCreadie [ 31/Mar/14 ]

Integrated patch into the Terrier 3.5 build.

Contains many javadoc additions and refactoring of IDF functions into a new WeightingModelLibrary class.

Comment by Richard McCreadie [ 31/Mar/14 ]

Committed version 3759.

Comment by Richard McCreadie [ 31/Mar/14 ]

Closing issue, will add note in Terrier 3.6 release issue to check java doc consistency for matching.models

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