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Search criteria: relevancy computation.
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org.apache.lucene.search.grouping (Lucene 4.3.0 API) - Lucene - [web site]
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...AllGroupHeadsCollector that can be used to retrieve all most relevant
documents per group. Also known as group heads. This can be useful in situations when one wants to compute group
based facets / statistics...
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... to compute the most relevant documents per group it is better to just use the collector as done here below.
AbstractAllGroupHeadsCollector c = TermAllGroupHeadsCollector.create(groupField, sort...
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[- hide]
| ... in collecting the most relevant document (group head) for each group that match the query.
AbstractAllGroupHeadsCollector.GroupHead<GROUP_VALUE_TYPE>
Represents a group head.
Abstract... |
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to collect grouped hits.
AbstractGroupFacetCollector
Base class for computing grouped facets.
AbstractGroupFacetCollector.FacetEntry
Represents a facet entry with a value and a count... |
| ..., if you specify "price" (ascending) then the first group
is the one with the lowest price book within it. Or if you
specify relevance group sort, then the first group is the one... |
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http://lucene.apache.org/java/4_3_0/grouping/org/apache.../package-summary.html
2013-05-06, 08:52
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Uses of Class org.apache.lucene.search.grouping.GroupingSearch (Lucene 4.2.1 API) - Lucene - [web site]
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...Search.setAllGroupHeads(boolean allGroupHeads)
Whether to compute all group heads (most relevant document per group) matching the query.
GroupingSearch GroupingSearch.setAllGroups(boolean allGroups)
Whether to also compute all...
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...Search.setIncludeMaxScore(boolean includeMaxScore)
Whether to include the score of the most relevant document per group.
GroupingSearch GroupingSearch.setIncludeScores(boolean includeScores)
Whether to include the scores per doc...
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http://lucene.apache.org/java/4_2_1/grouping/org/apache/.../GroupingSearch.html
2013-04-04, 00:43
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GroupingSearch (Lucene 4.2.1 API) - Lucene - [web site]
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... group heads (most relevant document per group) matching the query.
GroupingSearch setAllGroups(boolean allGroups)
Whether to also compute all groups matching the query...
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...AllGroupHeads(boolean allGroupHeads)
Whether to compute all group heads (most relevant document per group) matching the query.
This feature isn't enabled when grouping by doc block.
Parameters:
allGroupHeads - Whether...
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[- hide]
| ... to compute all group heads (most relevant document per group) matching the query
Returns:
this
getAllGroupHeads
public Bits getAllGroupHeads()
Returns the matching group heads if set... |
| ...(IndexSearcher searcher,
Query query,
int groupOffset,
int groupLimit)
Executes a grouped search.
GroupingSearch setAllGroupHeads(boolean allGroupHeads)
Whether to compute all... |
| ... groups are sorted.
GroupingSearch setIncludeMaxScore(boolean includeMaxScore)
Whether to include the score of the most relevant document per group.
GroupingSearch set... |
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http://lucene.apache.org/java/4_2_1/grouping/org/apache/.../GroupingSearch.html
2013-04-04, 00:43
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QualityStats (Lucene 4.1.0 API) - Lucene - [web site]
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... of queries.
Nested Class Summary
Nested Classes Modifier and Type Class and Description
static class QualityStats.RecallPoint
A certain rank in which a relevant doc was found...
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....
Field Summary
Fields Modifier and Type Field and Description
static int MAX_POINTS
Number of points for which precision is computed.
Constructor Summary
Constructors Constructor...
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QualityStats(double maxGoodPoints,
long searchTime)
Construct a QualityStats object with anticipated maximal number of relevant hits.
Method Summary
Methods... |
| ... Modifier and Type Method and Description
void addResult(int n,
boolean isRelevant,
long docNameExtractTime)
Add a (possibly relevant) doc.
static QualityStats average... |
| ... reciprocal rank over the queries or RR for a single query.
double getNumGoodPoints()
Returns the number of good points (only relevant points).
double getNumPoints()
Returns the number of points... |
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http://lucene.apache.org/java/4_1_0/benchmark/org/apache/l.../QualityStats.html
2013-01-22, 06:26
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Index (Lucene 4.3.0 API) - Lucene - [web site]
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....apache.lucene.search.grouping.AbstractGroupFacetCollector
setAllGroupHeads(boolean) - Method in class org.apache.lucene.search.grouping.GroupingSearch
Whether to compute all group heads (most relevant document per group) matching the query.
set...
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....apache.lucene.search.grouping
This collector specializes in collecting the most relevant document (group head) for each group that match the query.
AbstractAllGroupHeadsCollector(int) - Constructor for class org...
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[- hide]
| ....apache.lucene.search.grouping.AbstractFirstPassGroupingCollector
Create the first pass collector.
AbstractGroupFacetCollector - Class in org.apache.lucene.search.grouping
Base class for computing grouped facets.
Abstract... |
| ... relevant document.
compare(int, int) - Method in class org.apache.lucene.search.grouping.function.FunctionAllGroupHeadsCollector.GroupHead
compIDXEnd - Variable in class org... |
| ...AllGroupHeadsCollector - Class in org.apache.lucene.search.grouping.function
An implementation of AbstractAllGroupHeadsCollector for retrieving the most relevant groups when grouping
by ValueSource.
Function... |
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http://lucene.apache.org/core/4_3_0/grouping/index-all.html
2013-05-06, 08:52
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.apache.mahout.cf.taste.recommender.IDRescorer rescorer, int at, double relevanceThreshold, double evaluationPercentage) - Mahout - [javadoc]
- [see source code]
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... value is at least this value are considered "relevant" for the purposes
of computations @return {@link IRStatistics} with resulting precision, recall, etc. @throws Taste...
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...ModelBuilder} to use, or if null, a default {@link DataModel} implementation will be
used @param dataModel
dataset to test on @param rescorer
if any, to use when computing...
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[- hide]
| ... recommendations @param at
as in, "precision at 5". The number of recommendations to consider when evaluating precision,
etc. @param relevanceThreshold
items whose preference... |
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http://search-lucene.com/jd/ma...e.recommender.IDRescorer, int, double, double)
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org.apache.lucene.search.grouping.term (Lucene 4.2.1 API) - Lucene - [web site]
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...AllGroupHeadsCollector for retrieving the most relevant groups when grouping
on a string based group field.
TermAllGroupsCollector A collector that collects all groups that match the
query.
Term...
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...DocValues
to collect groups.
TermGroupFacetCollector An implementation of AbstractGroupFacetCollector that computes grouped facets based on the indexed terms
from the FieldCache.
Term...
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http://lucene.apache.org/java/4_2_1/grouping/org/apache.../package-summary.html
2013-04-04, 00:43
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Facet Userguide - Lucene - [web site]
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... a list of relevant price ranges; for the author facet, we get a list of
relevant authors; and so on. In most UIs, when users click one of these subcategories,
the search is narrowed, or drilled...
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... in itself,
even when the user never drills down. This list allows the user to see at one glance
some statistics on the search results, e.g., what price ranges and which authors are
most relevant...
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[- hide]
| ... computing the label is a time consuming task, and hence applications can
specify with a facet request to return top 1000 facets but to compute the label only for
the top 10 facets. In order... |
| ... to compute labels for more of the facet results it is not
required to perform accumulation again.
See FacetRequest.getNumResults(), FacetRequest.getNumLabel() and
Facet... |
| ... cases, once top facets are found over the sample set, exact
accumulations are computed for those facets only, this time over the entire matching
document set.
Two kinds of sampling exist... |
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http://lucene.apache.org/java/4_3_0/facet/org/apache/lucene/f.../userguide.html
2013-05-06, 08:52
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IndexableField (Lucene 4.2.1 API) - Lucene - [web site]
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... the field's index-time boost.
Only fields can have an index-time boost, if you want to simulate
a "document boost", then you must pre-multiply it across all the
relevant fields yourself...
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....
The boost is used to compute the norm factor for the field. By
default, in the Similarity.computeNorm(FieldInvertState) method,
the boost value is multiplied by the length normalization factor...
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| ...).
See Also:
Similarity.computeNorm(FieldInvertState),
TFIDFSimilarity.encodeNormValue(float)
binaryValue
BytesRef binaryValue()
Non-null if this field has a binary value... |
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http://lucene.apache.org/java/4_2_1/core/org/apache/luce.../IndexableField.html
2013-04-04, 00:43
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Uses of Class org.apache.lucene.search.grouping.GroupingSearch (Lucene 4.2.0 API) - Lucene - [web site]
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...Search GroupingSearch.disableCaching()
Disables any enabled cache.
GroupingSearch GroupingSearch.setAllGroupHeads(boolean allGroupHeads)
Whether to compute all group heads (most relevant document per...
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... group) matching the query.
GroupingSearch GroupingSearch.setAllGroups(boolean allGroups)
Whether to also compute all groups matching the query.
GroupingSearch Grouping...
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[- hide]
| ...Search.setIncludeMaxScore(boolean includeMaxScore)
Whether to include the score of the most relevant document per group.
GroupingSearch GroupingSearch.setIncludeScores(boolean includeScores)
Whether to include the scores per doc inside a group... |
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http://lucene.apache.org/java/4_2_0/grouping/org/apache/.../GroupingSearch.html
2013-03-11, 05:47
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