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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2018/06/15 06:52:00 UTC

[jira] [Commented] (SOLR-12273) Create Stream Evaluators for distance measures

    [ https://issues.apache.org/jira/browse/SOLR-12273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16513442#comment-16513442 ] 

Adrien Grand commented on SOLR-12273:
-------------------------------------

[~joel.bernstein] Should we resolve this issue?

> Create Stream Evaluators for distance measures
> ----------------------------------------------
>
>                 Key: SOLR-12273
>                 URL: https://issues.apache.org/jira/browse/SOLR-12273
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Joel Bernstein
>            Priority: Major
>             Fix For: 7.4
>
>         Attachments: SOLR-12273.patch
>
>
> Currently distance measures are instantiated by passing the name of the distance measure to a function, for example the *knn* function can be passed the named parameter: distance="manhattan". 
> This ticket will create a specific function for each distance measure which will be used to specify which distance measure to apply. With this design the *knn* function would be passed the function: manhattan() or any of the other distance measure functions.
> Sample syntax:
> {code:java}
> knn(a, b, manhattan())
> or
> dbscan(a, haversineMeters()){code}
>  
>  



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