Public Member Functions | |
| lengthNorm ($fieldName, $numTerms) | |
| Implemented as '1/sqrt(numTerms)'. | |
| queryNorm ($sumOfSquaredWeights) | |
| Implemented as '1/sqrt(sumOfSquaredWeights)'. | |
| tf ($freq) | |
| Implemented as 'sqrt(freq)'. | |
| sloppyFreq ($distance) | |
| Implemented as '1/(distance + 1)'. | |
| idfFreq ($docFreq, $numDocs) | |
| Implemented as 'log(numDocs/(docFreq+1)) + 1'. | |
| coord ($overlap, $maxOverlap) | |
| Implemented as 'overlap/maxOverlap'. | |
 Public Member Functions inherited from Zend_Search_Lucene_Search_Similarity | |
| lengthNorm ($fieldName, $numTokens) | |
| Computes the normalization value for a field given the total number of terms contained in a field. | |
| queryNorm ($sumOfSquaredWeights) | |
| Computes the normalization value for a query given the sum of the squared weights of each of the query terms. | |
| tf ($freq) | |
| Computes a score factor based on a term or phrase's frequency in a document. | |
| sloppyFreq ($distance) | |
| Computes the amount of a sloppy phrase match, based on an edit distance. | |
| idf ($input, Zend_Search_Lucene_Interface $reader) | |
| Computes a score factor for a simple term or a phrase. | |
| idfFreq ($docFreq, $numDocs) | |
| Computes a score factor based on a term's document frequency (the number of documents which contain the term). | |
| coord ($overlap, $maxOverlap) | |
| Computes a score factor based on the fraction of all query terms that a document contains. | |
Additional Inherited Members | |
| Static Public Member Functions inherited from Zend_Search_Lucene_Search_Similarity | |
| static | setDefault (Zend_Search_Lucene_Search_Similarity $similarity) |
| Set the default Similarity implementation used by indexing and search code. | |
| static | getDefault () |
| Return the default Similarity implementation used by indexing and search code. | |
| static | decodeNorm ($byte) |
| Decodes a normalization factor stored in an index. | |
| static | encodeNorm ($f) |
| Encodes a normalization factor for storage in an index. | |
Member Function Documentation
| coord | ( | $overlap, | |
| $maxOverlap | |||
| ) |
Implemented as 'overlap/maxOverlap'.
- Parameters
-
integer $overlap integer $maxOverlap
- Returns
- float
| idfFreq | ( | $docFreq, | |
| $numDocs | |||
| ) |
Implemented as 'log(numDocs/(docFreq+1)) + 1'.
- Parameters
-
integer $docFreq integer $numDocs
- Returns
- float
| lengthNorm | ( | $fieldName, | |
| $numTerms | |||
| ) |
Implemented as '1/sqrt(numTerms)'.
- Parameters
-
string $fieldName integer $numTerms
- Returns
- float
| queryNorm | ( | $sumOfSquaredWeights | ) |
Implemented as '1/sqrt(sumOfSquaredWeights)'.
- Parameters
-
float $sumOfSquaredWeights
- Returns
- float
| sloppyFreq | ( | $distance | ) |
Implemented as '1/(distance + 1)'.
- Parameters
-
integer $distance
- Returns
- float
| tf | ( | $freq | ) |
Implemented as 'sqrt(freq)'.
- Parameters
-
float $freq
- Returns
- float
