(11/12/07 3:42), Nejla Karacan wrote:
Hello,
I need the tf-idf-values from texts and now Im using Apache-Solr.
I am a novice and have some Problems.
My question is, how can I extract the tf-idf-values?
Nejla,
You can use TermVectorComponent on your field which is needed to be set
termVectors=true.
http://wiki.apache.org/solr/TermVectorComponent
With example config in solr, try this and see termVectors section in the
response xml:
http://localhost:8983/solr/select/?qt=tvrh&q=includes:[*+TO+*]&fl=id&tv.all=true
In addition, you can use relevancy function queries:
http://wiki.apache.org/solr/FunctionQuery#idf
But as it is function queries, those values are blended in scores,
you may want to set debugQuery=on and go explain section to see each values.
And the features of the relevancy function queries comes only in 4.0.
koji
--
Check out "Query Log Visualizer" for Apache Solr
http://www.rondhuit-demo.com/loganalyzer/loganalyzer.html
http://www.rondhuit.com/en/
