Search Ranking
Hi, I am quite new to Lucene. I am trying to use it to index listings of local businesses. The index has only one field, that stores the attributes of a listing as well as email addresses of users who have rated that business. For example, Listing 1: "XYZ Takeaway London f...@company.com bar...@company.com f...@company.com" Listing 2: "ABC Takeaway London f...@company.com bar...@company.com" Now when the user does a search with "Takeaway f...@company.com", how do I get listing 1 to always come before listing 2, because it has the term f...@company.com appear twice where as listing 2 has it only once? Regards Meeraj
Re: Search Ranking
Thanks Ivan. I don't use Lucene directly, it is used behind the scene by the Neo4J graph database for full-text indexing. According to their documentation for full text indexes they use white space tokenizer in the analyser. Yes, I do get Listing 2 first now. Though if I exclude the term "Takeaway" from the search string, and just put "f...@company.com", I get Listing 1 first. Regards Meeraj On Wed, May 16, 2012 at 8:49 PM, Ivan Brusic wrote: > Use the explain function to understand why the query is producing the > results you see. > > > http://lucene.apache.org/core/3_6_0/api/core/org/apache/lucene/search/Searcher.html#explain(org.apache.lucene.search.Query > , > int) > > Does your current query return Listing 2 first? That might be because > of term frequencies. Which analyzers are you using? > > http://www.lucidimagination.com/content/scaling-lucene-and-solr#d0e63 > > Cheers, > > Ivan > > On Wed, May 16, 2012 at 12:41 PM, Meeraj Kunnumpurath > wrote: > > Hi, > > > > I am quite new to Lucene. I am trying to use it to index listings of > local > > businesses. The index has only one field, that stores the attributes of a > > listing as well as email addresses of users who have rated that business. > > > > For example, > > > > Listing 1: "XYZ Takeaway London f...@company.com bar...@company.com > > f...@company.com" > > Listing 2: "ABC Takeaway London f...@company.com bar...@company.com" > > > > Now when the user does a search with "Takeaway f...@company.com", how > do I > > get listing 1 to always come before listing 2, because it has the term > > f...@company.com appear twice where as listing 2 has it only once? > > > > Regards > > Meeraj > > - > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
Re: Search Ranking
I have tried the same using Lucene directly with the following code,
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.util.Version;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopScoreDocCollector;
import org.apache.lucene.search.ScoreDoc;
public class LuceneTest {
public static void main(String[] args) throws Exception {
StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_35);
RAMDirectory index = new RAMDirectory();
IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_35,
analyzer);
IndexWriter indexWriter = new IndexWriter(index, config);
Document doc1 = new Document();
doc1.add(new Field("searchText", "ABC Takeaway f...@company.com
f...@company.com", Field.Store.YES, Field.Index.ANALYZED));
Document doc2 = new Document();
doc2.add(new Field("searchText", "XYZ Takeaway f...@company.com",
Field.Store.YES, Field.Index.ANALYZED));
indexWriter.addDocument(doc1);
indexWriter.addDocument(doc2);
indexWriter.close();
Query q = new QueryParser(Version.LUCENE_35, "searchText",
analyzer).parse("Takeaway");
int hitsPerPage = 10;
IndexReader reader = IndexReader.open(index);
IndexSearcher searcher = new IndexSearcher(reader);
TopScoreDocCollector collector =
TopScoreDocCollector.create(hitsPerPage, true);
searcher.search(q, collector);
ScoreDoc[] hits = collector.topDocs().scoreDocs;
System.out.println("Found " + hits.length + " hits.");
for(int i=0;i wrote:
> Thanks Ivan.
>
> I don't use Lucene directly, it is used behind the scene by the Neo4J
> graph database for full-text indexing. According to their documentation for
> full text indexes they use white space tokenizer in the analyser. Yes, I do
> get Listing 2 first now. Though if I exclude the term "Takeaway" from the
> search string, and just put "f...@company.com", I get Listing 1 first.
>
> Regards
> Meeraj
>
>
> On Wed, May 16, 2012 at 8:49 PM, Ivan Brusic wrote:
>
>> Use the explain function to understand why the query is producing the
>> results you see.
>>
>>
>> http://lucene.apache.org/core/3_6_0/api/core/org/apache/lucene/search/Searcher.html#explain(org.apache.lucene.search.Query
>> ,
>> int)
>>
>> Does your current query return Listing 2 first? That might be because
>> of term frequencies. Which analyzers are you using?
>>
>> http://www.lucidimagination.com/content/scaling-lucene-and-solr#d0e63
>>
>> Cheers,
>>
>> Ivan
>>
>> On Wed, May 16, 2012 at 12:41 PM, Meeraj Kunnumpurath
>> wrote:
>> > Hi,
>> >
>> > I am quite new to Lucene. I am trying to use it to index listings of
>> local
>> > businesses. The index has only one field, that stores the attributes of
>> a
>> > listing as well as email addresses of users who have rated that
>> business.
>> >
>> > For example,
>> >
>> > Listing 1: "XYZ Takeaway London f...@company.com bar...@company.com
>> > f...@company.com"
>> > Listing 2: "ABC Takeaway London f...@company.com bar...@company.com"
>> >
>> > Now when the user does a search with "Takeaway f...@company.com", how
>> do I
>> > get listing 1 to always come before listing 2, because it has the term
>> > f...@company.com appear twice where as listing 2 has it only once?
>> >
>> > Regards
>> > Meeraj
>>
>> -
>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
>> For additional commands, e-mail: java-user-h...@lucene.apache.org
>>
>>
>
Re: Search Ranking
The actual query is
Query q = new QueryParser(Version.LUCENE_35, "searchText",
analyzer).parse("Takeaway f...@company.com");
If I use
Query q = new QueryParser(Version.LUCENE_35, "searchText", analyzer).parse("
f...@company.com");
I get them in the reverse order.
Regards
Meeraj
On Wed, May 16, 2012 at 9:48 PM, Meeraj Kunnumpurath <
meeraj.kunnumpur...@asyska.com> wrote:
> I have tried the same using Lucene directly with the following code,
>
> import org.apache.lucene.store.RAMDirectory;
> import org.apache.lucene.document.Document;
> import org.apache.lucene.document.Field;
> import org.apache.lucene.index.IndexWriterConfig;
> import org.apache.lucene.util.Version;
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.index.IndexWriter;
> import org.apache.lucene.queryParser.QueryParser;
> import org.apache.lucene.index.IndexReader;
> import org.apache.lucene.search.IndexSearcher;
> import org.apache.lucene.search.Query;
> import org.apache.lucene.search.TopScoreDocCollector;
> import org.apache.lucene.search.ScoreDoc;
>
> public class LuceneTest {
>
> public static void main(String[] args) throws Exception {
>
> StandardAnalyzer analyzer = new
> StandardAnalyzer(Version.LUCENE_35);
> RAMDirectory index = new RAMDirectory();
> IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_35,
> analyzer);
> IndexWriter indexWriter = new IndexWriter(index, config);
>
> Document doc1 = new Document();
> doc1.add(new Field("searchText", "ABC Takeaway f...@company.com
> f...@company.com", Field.Store.YES, Field.Index.ANALYZED));
> Document doc2 = new Document();
> doc2.add(new Field("searchText", "XYZ Takeaway f...@company.com",
> Field.Store.YES, Field.Index.ANALYZED));
>
> indexWriter.addDocument(doc1);
> indexWriter.addDocument(doc2);
> indexWriter.close();
>
> Query q = new QueryParser(Version.LUCENE_35, "searchText",
> analyzer).parse("Takeaway");
>
> int hitsPerPage = 10;
> IndexReader reader = IndexReader.open(index);
> IndexSearcher searcher = new IndexSearcher(reader);
> TopScoreDocCollector collector =
> TopScoreDocCollector.create(hitsPerPage, true);
> searcher.search(q, collector);
> ScoreDoc[] hits = collector.topDocs().scoreDocs;
>
> System.out.println("Found " + hits.length + " hits.");
> for(int i=0;i int docId = hits[i].doc;
> Document d = searcher.doc(docId);
> System.out.println((i + 1) + ". " + d.get("searchText"));
> }
>
> }
>
> }
>
> The output is ..
>
> Found 2 hits.
> 1. XYZ Takeaway f...@company.com
> 2. ABC Takeaway f...@company.com f...@company.com
>
>
> On Wed, May 16, 2012 at 9:21 PM, Meeraj Kunnumpurath <
> meeraj.kunnumpur...@asyska.com> wrote:
>
>> Thanks Ivan.
>>
>> I don't use Lucene directly, it is used behind the scene by the Neo4J
>> graph database for full-text indexing. According to their documentation for
>> full text indexes they use white space tokenizer in the analyser. Yes, I do
>> get Listing 2 first now. Though if I exclude the term "Takeaway" from the
>> search string, and just put "f...@company.com", I get Listing 1 first.
>>
>> Regards
>> Meeraj
>>
>>
>> On Wed, May 16, 2012 at 8:49 PM, Ivan Brusic wrote:
>>
>>> Use the explain function to understand why the query is producing the
>>> results you see.
>>>
>>>
>>> http://lucene.apache.org/core/3_6_0/api/core/org/apache/lucene/search/Searcher.html#explain(org.apache.lucene.search.Query
>>> ,
>>> int)
>>>
>>> Does your current query return Listing 2 first? That might be because
>>> of term frequencies. Which analyzers are you using?
>>>
>>> http://www.lucidimagination.com/content/scaling-lucene-and-solr#d0e63
>>>
>>> Cheers,
>>>
>>> Ivan
>>>
>>> On Wed, May 16, 2012 at 12:41 PM, Meeraj Kunnumpurath
>>> wrote:
>>> > Hi,
>>> >
>>> > I am quite new to Lucene. I am trying to use it to index listings of
>>> local
>>> > businesses. The index has only one field, that stores the attributes
>>> of a
>>> > listing as well as email addresses of users who have rated that
>>> business.
>>> >
>>> > For example,
>>> >
>>> > Listing 1: "XYZ Takeaway London f...@company.com bar...@company.com
>>> > f...@company.com"
>>> > Listing 2: "ABC Takeaway London f...@company.com bar...@company.com"
>>> >
>>> > Now when the user does a search with "Takeaway f...@company.com", how
>>> do I
>>> > get listing 1 to always come before listing 2, because it has the term
>>> > f...@company.com appear twice where as listing 2 has it only once?
>>> >
>>> > Regards
>>> > Meeraj
>>>
>>> -
>>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
>>> For additional commands, e-mail: java-user-h...@lucene.apache.org
>>>
>>>
>>
>
Re: Search Ranking
This is the output I get from explaining the plan ..
Found 2 hits.
1. XYZ Takeaway f...@company.com
0.5148823 = (MATCH) sum of:
0.17162743 = (MATCH) weight(searchText:takeaway in 1), product of:
0.57735026 = queryWeight(searchText:takeaway), product of:
0.5945349 = idf(docFreq=2, maxDocs=2)
0.97109574 = queryNorm
0.29726744 = (MATCH) fieldWeight(searchText:takeaway in 1), product of:
1.0 = tf(termFreq(searchText:takeaway)=1)
0.5945349 = idf(docFreq=2, maxDocs=2)
0.5 = fieldNorm(field=searchText, doc=1)
0.34325486 = (MATCH) sum of:
0.17162743 = (MATCH) weight(searchText:fred in 1), product of:
0.57735026 = queryWeight(searchText:fred), product of:
0.5945349 = idf(docFreq=2, maxDocs=2)
0.97109574 = queryNorm
0.29726744 = (MATCH) fieldWeight(searchText:fred in 1), product of:
1.0 = tf(termFreq(searchText:fred)=1)
0.5945349 = idf(docFreq=2, maxDocs=2)
0.5 = fieldNorm(field=searchText, doc=1)
0.17162743 = (MATCH) weight(searchText:company.com in 1), product of:
0.57735026 = queryWeight(searchText:company.com), product of:
0.5945349 = idf(docFreq=2, maxDocs=2)
0.97109574 = queryNorm
0.29726744 = (MATCH) fieldWeight(searchText:company.com in 1),
product of:
1.0 = tf(termFreq(searchText:company.com)=1)
0.5945349 = idf(docFreq=2, maxDocs=2)
0.5 = fieldNorm(field=searchText, doc=1)
2. ABC Takeaway f...@company.com f...@company.com
0.49279732 = (MATCH) sum of:
0.12872057 = (MATCH) weight(searchText:takeaway in 0), product of:
0.57735026 = queryWeight(searchText:takeaway), product of:
0.5945349 = idf(docFreq=2, maxDocs=2)
0.97109574 = queryNorm
0.22295058 = (MATCH) fieldWeight(searchText:takeaway in 0), product of:
1.0 = tf(termFreq(searchText:takeaway)=1)
0.5945349 = idf(docFreq=2, maxDocs=2)
0.375 = fieldNorm(field=searchText, doc=0)
0.36407676 = (MATCH) sum of:
0.18203838 = (MATCH) weight(searchText:fred in 0), product of:
0.57735026 = queryWeight(searchText:fred), product of:
0.5945349 = idf(docFreq=2, maxDocs=2)
0.97109574 = queryNorm
0.31529972 = (MATCH) fieldWeight(searchText:fred in 0), product of:
1.4142135 = tf(termFreq(searchText:fred)=2)
0.5945349 = idf(docFreq=2, maxDocs=2)
0.375 = fieldNorm(field=searchText, doc=0)
0.18203838 = (MATCH) weight(searchText:company.com in 0), product of:
0.57735026 = queryWeight(searchText:company.com), product of:
0.5945349 = idf(docFreq=2, maxDocs=2)
0.97109574 = queryNorm
0.31529972 = (MATCH) fieldWeight(searchText:company.com in 0),
product of:
1.4142135 = tf(termFreq(searchText:company.com)=2)
0.5945349 = idf(docFreq=2, maxDocs=2)
0.375 = fieldNorm(field=searchText, doc=0)
On Wed, May 16, 2012 at 9:50 PM, Meeraj Kunnumpurath <
meeraj.kunnumpur...@asyska.com> wrote:
> The actual query is
>
> Query q = new QueryParser(Version.LUCENE_35, "searchText",
> analyzer).parse("Takeaway f...@company.com");
>
> If I use
>
> Query q = new QueryParser(Version.LUCENE_35, "searchText",
> analyzer).parse("f...@company.com");
>
> I get them in the reverse order.
>
> Regards
> Meeraj
>
>
> On Wed, May 16, 2012 at 9:48 PM, Meeraj Kunnumpurath <
> meeraj.kunnumpur...@asyska.com> wrote:
>
>> I have tried the same using Lucene directly with the following code,
>>
>> import org.apache.lucene.store.RAMDirectory;
>> import org.apache.lucene.document.Document;
>> import org.apache.lucene.document.Field;
>> import org.apache.lucene.index.IndexWriterConfig;
>> import org.apache.lucene.util.Version;
>> import org.apache.lucene.analysis.standard.StandardAnalyzer;
>> import org.apache.lucene.index.IndexWriter;
>> import org.apache.lucene.queryParser.QueryParser;
>> import org.apache.lucene.index.IndexReader;
>> import org.apache.lucene.search.IndexSearcher;
>> import org.apache.lucene.search.Query;
>> import org.apache.lucene.search.TopScoreDocCollector;
>> import org.apache.lucene.search.ScoreDoc;
>>
>> public class LuceneTest {
>>
>> public static void main(String[] args) throws Exception {
>>
>> StandardAnalyzer analyzer = new
>> StandardAnalyzer(Version.LUCENE_35);
>> RAMDirectory index = new RAMDirectory();
>> IndexWriterConfig config = new
>> IndexWriterConfig(Version.LUCENE_35,
>> analyzer);
>> IndexWriter indexWriter = new IndexWriter(index, config);
>>
>> Document doc1 = new Document();
>> doc1.add(new Field("searchText", "ABC Takeaway f...@company.com
>> f...@company.com", Field.Store.YES, Field.Index.ANALYZE
Re: Search Ranking
Also, if I do the below
Query q = new QueryParser(Version.LUCENE_35, "searchText",
analyzer).parse("Takeaway f...@company.com^100")
I get them in reverse order. Do I need to boost the term, even if it
appears more than once in the document?
Regards
Meeraj
On Wed, May 16, 2012 at 9:52 PM, Meeraj Kunnumpurath <
meeraj.kunnumpur...@asyska.com> wrote:
> This is the output I get from explaining the plan ..
>
>
> Found 2 hits.
> 1. XYZ Takeaway f...@company.com
> 0.5148823 = (MATCH) sum of:
> 0.17162743 = (MATCH) weight(searchText:takeaway in 1), product of:
> 0.57735026 = queryWeight(searchText:takeaway), product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.97109574 = queryNorm
> 0.29726744 = (MATCH) fieldWeight(searchText:takeaway in 1), product of:
> 1.0 = tf(termFreq(searchText:takeaway)=1)
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.5 = fieldNorm(field=searchText, doc=1)
> 0.34325486 = (MATCH) sum of:
> 0.17162743 = (MATCH) weight(searchText:fred in 1), product of:
> 0.57735026 = queryWeight(searchText:fred), product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.97109574 = queryNorm
> 0.29726744 = (MATCH) fieldWeight(searchText:fred in 1), product of:
> 1.0 = tf(termFreq(searchText:fred)=1)
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.5 = fieldNorm(field=searchText, doc=1)
> 0.17162743 = (MATCH) weight(searchText:company.com in 1), product of:
> 0.57735026 = queryWeight(searchText:company.com), product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.97109574 = queryNorm
> 0.29726744 = (MATCH) fieldWeight(searchText:company.com in 1),
> product of:
> 1.0 = tf(termFreq(searchText:company.com)=1)
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.5 = fieldNorm(field=searchText, doc=1)
>
>
> 2. ABC Takeaway f...@company.com f...@company.com
> 0.49279732 = (MATCH) sum of:
> 0.12872057 = (MATCH) weight(searchText:takeaway in 0), product of:
> 0.57735026 = queryWeight(searchText:takeaway), product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.97109574 = queryNorm
> 0.22295058 = (MATCH) fieldWeight(searchText:takeaway in 0), product of:
> 1.0 = tf(termFreq(searchText:takeaway)=1)
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.375 = fieldNorm(field=searchText, doc=0)
> 0.36407676 = (MATCH) sum of:
> 0.18203838 = (MATCH) weight(searchText:fred in 0), product of:
> 0.57735026 = queryWeight(searchText:fred), product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.97109574 = queryNorm
> 0.31529972 = (MATCH) fieldWeight(searchText:fred in 0), product of:
> 1.4142135 = tf(termFreq(searchText:fred)=2)
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.375 = fieldNorm(field=searchText, doc=0)
> 0.18203838 = (MATCH) weight(searchText:company.com in 0), product of:
> 0.57735026 = queryWeight(searchText:company.com), product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.97109574 = queryNorm
> 0.31529972 = (MATCH) fieldWeight(searchText:company.com in 0),
> product of:
> 1.4142135 = tf(termFreq(searchText:company.com)=2)
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.375 = fieldNorm(field=searchText, doc=0)
>
>
> On Wed, May 16, 2012 at 9:50 PM, Meeraj Kunnumpurath <
> meeraj.kunnumpur...@asyska.com> wrote:
>
>> The actual query is
>>
>> Query q = new QueryParser(Version.LUCENE_35, "searchText",
>> analyzer).parse("Takeaway f...@company.com");
>>
>> If I use
>>
>> Query q = new QueryParser(Version.LUCENE_35, "searchText",
>> analyzer).parse("f...@company.com");
>>
>> I get them in the reverse order.
>>
>> Regards
>> Meeraj
>>
>>
>> On Wed, May 16, 2012 at 9:48 PM, Meeraj Kunnumpurath <
>> meeraj.kunnumpur...@asyska.com> wrote:
>>
>>> I have tried the same using Lucene directly with the following code,
>>>
>>> import org.apache.lucene.store.RAMDirectory;
>>> import org.apache.lucene.document.Document;
>>> import org.apache.lucene.document.Field;
>>> import org.apache.lucene.index.IndexWriterConfig;
>>> import org.apache.lucene.util.Version;
>>> import org.apache.lucene.analysis.standard.StandardAnalyzer;
>>> import org.apache.lucene.index.IndexWriter;
>>> import org.apache.lucene.queryParser.QueryParser;
>>> import org.apache.lucene.index.IndexReader;
>>> import org.apache.lucene.search.IndexSearcher;
>>> import org.apache
Optional Terms
Hi,
I have the following documents
Document doc1 = new Document();
doc1.add(new Field("searchText", "ABC Takeaway f...@company.com
f...@company.com", Field.Store.YES, Field.Index.ANALYZED));
Document doc2 = new Document();
doc2.add(new Field("searchText", "XYZ Takeaway f...@company.com",
Field.Store.YES, Field.Index.ANALYZED));
Document doc3 = new Document();
doc2.add(new Field("searchText", "LMN Takeaway", Field.Store.YES,
Field.Index.ANALYZED));
My query is
Query q = new QueryParser(Version.LUCENE_35, "searchText",
analyzer).parse("+Takeaway f...@company.com^100");
This returns only doc1 and doc2. How do I need to modify the query, so that
the first term (Takeaway) is mandatory and the second one (f...@company.com)
is optional? Also, I would like to boost those documents based on the
number of occurrences of the second term.
Regards
Meeraj
Re: Optional Terms
Thanks Ian
Sent from my iPhone
On 17 May 2012, at 09:29, Ian Lea wrote:
>> Document doc3 = new Document();
>> doc2.add(new Field("searchText", "LMN Takeaway", Field.Store.YES,
>
> doc2 != doc3.
>
> Boosting by number of occurrences tends to happen automatically. See
> IndexSearcher.explain() as I think someone already suggested. See
> also javadocs for org.apache.lucene.search.Similarity. You can plug
> in your own implementation if you want to tweak the scoring.
>
>
> --
> Ian.
>
>
> On Wed, May 16, 2012 at 10:06 PM, Meeraj Kunnumpurath
> wrote:
>> Hi,
>>
>> I have the following documents
>>
>> Document doc1 = new Document();
>> doc1.add(new Field("searchText", "ABC Takeaway f...@company.com
>> f...@company.com", Field.Store.YES, Field.Index.ANALYZED));
>> Document doc2 = new Document();
>> doc2.add(new Field("searchText", "XYZ Takeaway f...@company.com",
>> Field.Store.YES, Field.Index.ANALYZED));
>> Document doc3 = new Document();
>> doc2.add(new Field("searchText", "LMN Takeaway", Field.Store.YES,
>> Field.Index.ANALYZED));
>>
>> My query is
>>
>> Query q = new QueryParser(Version.LUCENE_35, "searchText",
>> analyzer).parse("+Takeaway f...@company.com^100");
>>
>> This returns only doc1 and doc2. How do I need to modify the query, so that
>> the first term (Takeaway) is mandatory and the second one (f...@company.com)
>> is optional? Also, I would like to boost those documents based on the
>> number of occurrences of the second term.
>>
>> Regards
>> Meeraj
>
> -
> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
> For additional commands, e-mail: java-user-h...@lucene.apache.org
>
-
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
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Boosting numerical field
Hi, Is there anyway in a query, I can boost the relevance of a hit based on the value of a numerical field in the index. i.e higher the value of the field, more relevant the hit is. Kind regards Meeraj - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Re: Boosting numerical field
Thank you Sent from my iPad On 19 May 2012, at 09:07, Ahmet Arslan wrote: > >> Is there anyway in a query, I can boost the relevance of a >> hit based on the value of a numerical field in the index. >> i.e higher the value of the field, more relevant the hit >> is. > > Yes it is possible. Like view count, popularity etc. You can use e(dismax)'s > bf boosting function (additive or multiplicative. > > http://wiki.apache.org/solr/ExtendedDisMax#boost_.28Boost_Function.2C_multiplicative.29 > > http://wiki.apache.org/solr/ExtendedDisMax#bf_.28Boost_Function.2C_additive.29 > > - > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Re: Boosting numerical field
Hi, Is this available only with Solr or would it work if I am using plain Lucene? Regards Meeraj On Sat, May 19, 2012 at 9:07 AM, Ahmet Arslan wrote: > > > Is there anyway in a query, I can boost the relevance of a > > hit based on the value of a numerical field in the index. > > i.e higher the value of the field, more relevant the hit > > is. > > Yes it is possible. Like view count, popularity etc. You can use > e(dismax)'s bf boosting function (additive or multiplicative. > > > http://wiki.apache.org/solr/ExtendedDisMax#boost_.28Boost_Function.2C_multiplicative.29 > > > http://wiki.apache.org/solr/ExtendedDisMax#bf_.28Boost_Function.2C_additive.29 > > - > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
