Thanks Brin, your answer solved my problem.
Thanks Ivan to you too, I am having 5 shards, idf is getting calculated on
the maxdocs present in that shard. Doesn't that leads to misleading idf?
On Tuesday, 11 February 2014 20:10:52 UTC+5:30, sunayana choudhary wrote:
>
> Hi all,
>
> I have been analysing Elasticsearch results with explain:true condition, I
> am not able to understand what technique has been applied to calculate
> idf. I went through the lucene scoring formula i.e.
>
> idf(t) = 1+log(NumDocs/Doc frequency+1)
>
> Does not matches my results.
> Following is explanation for one of the results returned.
> _explanation: {
> value: 5.8878393
> description: weight(city:chicago in 1) [PerFieldSimilarity],
> result of:
> details: [
> {
> value: 5.8878393
> description: score(doc=1,freq=1.0 = termFreq=1.0 ),
> product of:
> details: [
> {
> value: 0.99999994
> description: queryWeight, product of:
> details: [
> {
> value: 5.88784
> description: idf(docFreq=2, maxDocs=398)
> }
> {
> value: 0.16984157
> description: queryNorm
> }
> ]
> }
> {
> value: 5.88784
> description: fieldWeight in 1, product of:
> details: [
> {
> value: 1
> description: tf(freq=1.0), with freq of:
> details: [
> {
> value: 1
> description: termFreq=1.0
> }
> ]
> }
> {
> value: 5.88784
> description: idf(docFreq=2, maxDocs=398)
> }
> {
> value: 1
> description: fieldNorm(doc=1)
> }
> ]
> }
> ]
> }
> ]
> }
>
> }
>
> Thanks in advance.. :)
>
>
>
--
You received this message because you are subscribed to the Google Groups
"elasticsearch" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to elasticsearch+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/elasticsearch/dc8907ed-59c5-4432-9472-b596e9e3a4ea%40googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
