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Search results for relevence computation :
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LMDirichletSimilarity for multiple fields - Lucene - [mail # user]
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...Query and FieldsQuery to get relevant documents and compute the ranking function (the first probability). However, my current solution omits p(t | \theta^f) values for the fields, which do not contain...
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... + mu * collectionProbability) / (docLen + mu); return score; } @Override public void computeNorm(FieldInvertState state, Norm norm) { byte length = new Integer...
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[- hide]
| ... occurrences of a given term t. Those values should be computed by LMPerFieldDirichletSimilarity.score with freq=0. Surely, the problem comes from the fact that Lucene does not retrieve such term... |
| ... Federal University Computational Linguistics Laboratory Russia, 420008 Kazan, Prof. Nuzhina Str., 1/37 room 117 Skype: nickita.jhiltsov Personal page: http://cll.niimm.ksu.ru/~nzhiltsov E... |
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Author: Nikita Zhiltsov,
2012-12-10, 05:36
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Re: Can someone suggest an approach for calculating precision and recall for distributed recommendations? - Mahout - [mail # user]
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...Obviously, you need to refer also to scores of other items as well. One handy stat is AUC whcih you can compute by averaging to get the probability that a relevant (viewed) item has...
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... a higher recommendation score than a non-relevant (not viewed) item. On Sun, Aug 26, 2012 at 5:55 PM, Sean Owen wrote: ...
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Author: Ted Dunning,
2012-08-27, 21:54
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GenericRecommenderIRStatsEvaluator.java - Mahout - [source code]
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....0);
/**
* Pass as "relevanceThreshold" argument to
* {@link #evaluate(RecommenderBuilder, DataModelBuilder, DataModel, IDRescorer, int, double, double)} to
* have it attempt to compute a reasonable...
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...Model.getPreferencesFromUser(userID);
// List some most-preferred items that would count as (most) "relevant" results
double theRelevanceThreshold = Double.isNaN(relevanceThreshold) ? computeThreshold(prefs) : relevance...
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| ...RecommendedItems - intersectionSize)
/ (double) (numItems - numRelevantItems));
}
// nDCG
// In computing, assume relevant IDs have relevance 1 and others 0
double... |
| ....apache.mahout.cf.taste.eval.RecommenderBuilder;
import org.apache.mahout.cf.taste.eval.RecommenderIRStatsEvaluator;
import org.apache.mahout.cf.taste.eval.RelevantItemsDataSplitter;
import org... |
| ... threshold. Note that this will impact performance.
*/
public static final double CHOOSE_THRESHOLD = Double.NaN;
private final Random random;
private final RelevantItemsDataSplitter data... |
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Lucene Change Log - Lucene - [web site]
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..._ONLY instead.
(Robert Muir)
LUCENE-3097: Added a new grouping collector that can be used to retrieve all most relevant
documents per group. This can be useful in situations when one wants to compute...
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.... Improved age calculation in SearcherLifetimeManager, to have
double precision and to compute age to be how long ago the searcher
was replaced with a new searcher
(Mike McCandless)
LUCENE-3658...
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| ... IndexWriter
(Robert Muir, Mike McCandless)
LUCENE-3215: SloppyPhraseScorer sometimes computed Infinite freq
(Robert Muir, Doron Cohen)
LUCENE-3465: IndexSearcher with Executor... |
| ...)
LUCENE-2834: the hash used to compute the lock file name when the
lock file is not stored in the index has changed. This means you
will see a different lucene-XXX-write.lock in your lock... |
| ....lengthNorm; the latter is now final, forcing any custom
Similarity impls to cutover to the more general computeNorm
(Robert
Muir, Mike McCandless)
LUCENE-2869: Deprecated Query.getSimilarity: instead of using... |
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http://lucene.apache.org/java/3_6_0/changes/Changes.html
2012-04-12, 03:32
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Lucene contrib change Log - Lucene - [web site]
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...AutoStopWordAnalyzer.addStopWords* since they
prevent reuse. Stopwords are now to be computed when the Analyzer is instantiated.
If new stopwords are needed, a new Analyzer instance should be created.
(Chris Male)
LUCENE-3434...
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... of categories, and index them
with documents. It also provides search API for aggregating (e.g. count)
the weights of the categories that are relevant to the search results.
(Shai Erera)
LUCENE-3171...
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| ...GroupingCollector, a single pass
grouping collector which is faster than the two-pass approach, and
also computes the total group count, but requires that every
document sharing the same group was indexed as a doc... |
| ...-suffix)
to use the new TokenStream API. ShingleFilter is much more efficient now,
it clones much less often and computes the tokens mostly on the fly now.
Also added more tests.
(Robert Muir, Michael... |
| ...Keys encoded using
IndexableBinaryStringTools. This allows for faster RangeQuery when
a field needs to use a custom Collator.
(Steven Rowe via Mike
McCandless)
LUCENE-1591: EnWikiDocMaker, Line... |
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http://lucene.apache.org/java/old_versioned_docs/versio.../Contrib-Changes.html
2012-04-01, 05:07
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Lucene Change Log - Lucene - [web site]
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... all most relevant
documents per group. This can be useful in situations when one wants to compute grouping
based facets / statistics on the complete query result.
(Martijn van Groningen...
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...,
return a SingleTermEnum.
(ludovic Boutros, Uwe Schindler, Robert Muir)
Changes in runtime behavior (4)
LUCENE-2834: the hash used to compute the lock file name when the
lock file...
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[+ show more]
[- hide]
| ... to cutover to the more general computeNorm
(Robert
Muir, Mike McCandless)
LUCENE-2869: Deprecated Query.getSimilarity: instead of using
"runtime" subclassing/delegation, subclass the Weight instead... |
| .... Only the Unicode Basic Multilingual
Plane (code points from U+0000 to U+FFFF) is covered.
UAX29URLEmailTokenizer tokenizes URLs and E-mail addresses according to the
relevant RFCs... |
| ... SegmentInfo.sizeInBytes to factor includeDocStores when it
decides whether to return the cached computed size or not.
(Shai Erera)
LUCENE-2584: SegmentInfo.files() could hit Concurrent... |
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http://lucene.apache.org/java/old_versioned_docs/versions/3_4_0.../Changes.html
2012-04-01, 05:07
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Lucene Change Log - Lucene - [web site]
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... Levenshtein Distance computation in
FuzzyQuery.
(Cédrik Lime via Mike McCandless)
LUCENE-2006: Optimization of FieldDocSortedHitQueue to always
use Comparable<?> interface.
(Uwe Schindler...
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...-IndexSearcher whether scores are computed
when sorting by field.
(Uwe Schindler, Mike McCandless)
LUCENE-2043: Make IndexReader.commit(Map<String,String>) public.
(Mike McCandless)
Documentation...
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[- hide]
| ... compatibility policy (8)
LUCENE-1575: Searchable.search(Weight, Filter, int, Sort) no
longer computes a document score for each hit by default. If
document score tracking is still needed, you... |
| ...: Similarity now has a computeNorm method that allows
custom Similarity classes to override how norm is computed. It's
provided a FieldInvertState instance that contains details from
inverting... |
| ...ScoreRangeQuery
(Mark Miller via Mike
McCandless)
LUCENE-1461: Added FieldCacheRangeFilter, a RangeFilter for
single-term fields that uses FieldCache to compute the filter. If
your documents all have... |
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http://lucene.apache.org/java/docs/old_versioned_docs/versions/.../Changes.html
2012-04-01, 05:05
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Re: Spatial+Dataimport full import results in OutOfMemory for a rectangle defining a line - Solr - [mail # user]
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...Javier Molina wrote Due to the bug, the accuracy computing algorithm believes the width for both of these is 0. That algorithm also looks at the height, which is computed correctly...
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....getBoundingBox(); //The diagonal distance should be the same computed from any opposite corner, // and this is the longest distance that might be occurring within the shape. double diagonalDist = ctx...
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| ...Strategy also has some nifty area overlap relevancy calculations. ~ David Author: http://www.packtpub.com/apache-solr-3-enterprise-search-server/book View this message in context: http... |
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Author: David Smiley,
2013-01-22, 16:43
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Lucene contrib change Log - Lucene - [web site]
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... of categories, and index them
with documents. It also provides search API for aggregating (e.g. count)
the weights of the categories that are relevant to the search results.
(Shai Erera)
LUCENE-3171...
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..., Mike Mccandless, Robert Muir)
LUCENE-3129: Added BlockGroupingCollector, a single pass
grouping collector which is faster than the two-pass approach, and
also computes the total group count...
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[+ show more]
[- hide]
| ... often and computes the tokens mostly on the fly now.
Also added more tests.
(Robert Muir, Michael Busch, Uwe Schindler, Chris Harris)
LUCENE-1685: The position aware SpanScorer has become... |
| ...
a field needs to use a custom Collator.
(Steven Rowe via Mike
McCandless)
LUCENE-1591: EnWikiDocMaker, LineDocMaker, WriteLineDoc can now
read/write bz2 using Apache commons compress library... |
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http://lucene.apache.org/java/docs/old_versioned_docs/v.../Contrib-Changes.html
2012-02-06, 23:25
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Re: Vector distance within a cluster - Mahout - [mail # user]
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... it the centroids and data points you have and use it to return a list of OnlineSummarizers with the relevant distance statistics (your classes are probably not the same but this is a good starting point...
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...). I computed the distances from each point to its cluster's center and summarized the distances in an OnlineSummarizer. You then get (similar to what you ask for): 1. the number of points...
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Author: Dan Filimon,
2013-02-26, 16:04
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