[ https://issues.apache.org/jira/browse/SOLR-13047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16862592#comment-16862592 ]
Cassandra Targett commented on SOLR-13047: ------------------------------------------ There were 2 pull requests created for this change - #659, which is closed, and #660 which is still open. I presume since this is resolved that #660 can be closed? > Add facet2D Streaming Expression > -------------------------------- > > Key: SOLR-13047 > URL: https://issues.apache.org/jira/browse/SOLR-13047 > Project: Solr > Issue Type: New Feature > Reporter: Joel Bernstein > Assignee: Joel Bernstein > Priority: Major > Fix For: 8.2 > > Time Spent: 50m > Remaining Estimate: 0h > > The current facet expression is a generic tool for creating multi-dimension > aggregations. The *facet2D* Streaming Expression has semantics specific for 2 > dimensional facets which are designed to be *pivoted* into a matrix and > operated on by *Math Expressions*. > facet2D will use the json facet API under the covers. > Proposed syntax: > {code:java} > facet2D(medrecords, q=*:*, x=diseases, y=symptoms, dimensions="300, 10", > count(*)){code} > The example above will return tuples containing the top 300 diseases and the > top ten symptoms for each disease. > Using math expression the tuples can be *pivoted* into a matrix where the > rows of the matrix are the diseases, the columns of the matrix are the > symptoms and the cells in the matrix contain the counts. This matrix can then > be *clustered* to find clusters of *diseases* that are correlated by > *symptoms*. > {code:java} > let(a=facet2D(medrecords, q=*:*, x=diseases, y=symptoms, dimensions="300, > 10", count(*)), > b=pivot(a, diseases, symptoms, count(*)), > c=kmeans(b, 10)){code} > > *Implementation Note:* > The implementation plan for this ticket is to create a new stream called > Facet2DStream. The FacetStream code is a good starting point for the new > implementation and can be adapted for the Facet2D parameters. Similar tests > to the FacetStream can be added to StreamExpressionTest > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org