| commit | b003809378b0ac3a773a5bff67203351f9d35116 | |
| author | Olly Betts <olly@survex.com> | |
| Wed, 19 Jun 2024 01:44:37 +0000 (19 13:44 +1200) | ||
| committer | Olly Betts <olly@survex.com> | |
| Wed, 19 Jun 2024 01:44:37 +0000 (19 13:44 +1200) | ||
| tree | 39ae790c55bee271321ed8ed2efa44dd9375bd3e | treesnapshot (tar.gz zip) |
| parent | 65f3a6edc3073ffa13fe0b8345e44ce10bdd1762 | commitdiff |
Fix bug in PL2+ implementation
Our variable mean is 1/lambda_t from the PL2+ paper, so we need to check
mean > 1 for lambda_t < 1 but we were actually checking mean < 1.
The result of this is that PL2+ actually returned a zero weight unless
the term occurred frequently enough in the collection.
Our variable mean is 1/lambda_t from the PL2+ paper, so we need to check
mean > 1 for lambda_t < 1 but we were actually checking mean < 1.
The result of this is that PL2+ actually returned a zero weight unless
the term occurred frequently enough in the collection.
| xapian-core/tests/api_weight.cc | diffblobblamehistory | |
| xapian-core/weight/pl2plusweight.cc | diffblobblamehistory |