Re: Lucene cosine similarity score for more like this query

2015-02-03 Thread Ali Nazemian
Dear Koji, Thank you very much. Do you know what is the range of score in this new formula? What is the reasonable threshold for considering two documents as similar enough in this formula? Regards. On Tue, Feb 3, 2015 at 1:35 PM, Koji Sekiguchi k...@r.email.ne.jp wrote: Lucene uses

Re: Lucene cosine similarity score for more like this query

2015-02-03 Thread Koji Sekiguchi
Lucene uses TFIDFSimilarity class to calculate the similarity. It is implemented on the idea of cosine measurement but it modifies the cosine formula. Please take a look at Lucene Practical Scoring Function in the following Javadoc:

RE: Lucene cosine similarity score for more like this query

2015-02-02 Thread Markus Jelsma
: Lucene cosine similarity score for more like this query Dear Erik, Thank you for your response. Would younplease tell me why this score could be higher than 1? While cosine similarity can not be higher than 1. On Feb 2, 2015 7:32 PM, Erik Hatcher erik.hatc...@gmail.com wrote: The scoring

Re: Lucene cosine similarity score for more like this query

2015-02-02 Thread Ali Nazemian
Dear Erik, Thank you for your response. Would younplease tell me why this score could be higher than 1? While cosine similarity can not be higher than 1. On Feb 2, 2015 7:32 PM, Erik Hatcher erik.hatc...@gmail.com wrote: The scoring is the same as Lucene. To get deeper insight into how a score

Re: Lucene cosine similarity score for more like this query

2015-02-02 Thread Dikshant Shahi
Subject: Re: Lucene cosine similarity score for more like this query Dear Erik, Thank you for your response. Would younplease tell me why this score could be higher than 1? While cosine similarity can not be higher than 1. On Feb 2, 2015 7:32 PM, Erik Hatcher erik.hatc...@gmail.com wrote

Lucene cosine similarity score for more like this query

2015-02-02 Thread Ali Nazemian
Hi, I was wondering what is the range of score is brought by more like this query in Solr? I know that the Lucene uses cosine similarity in vector space model for calculating similarity between two documents. I also know that cosine similarity is between -1 and 1 but the fact that I dont

Re: Lucene cosine similarity score for more like this query

2015-02-02 Thread Erik Hatcher
The scoring is the same as Lucene. To get deeper insight into how a score is computed, use Solr’s debug=true mode to see the explain details in the response. Erik On Feb 2, 2015, at 10:49 AM, Ali Nazemian alinazem...@gmail.com wrote: Hi, I was wondering what is the range of score