[SOLR-11863] Add knnRegress Stream Evaluator to support nearest neighbor regression

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Fix Version/s: 7.5, 8.0
• Assignee: Joel Bernstein
• Reporter: Joel Bernstein
• Created: 17/Jan/18 01:32
• Updated: 27/Jan/22 14:35
• Resolved: 30/Aug/18 13:05

Description

This ticket adds the knnRegress Stream Evaluator to add support for nearest neighbor regression to the Streaming Expressions machine learning library.

Sample syntax:

let(sample=random(collection1, q=":", rows=10000, fl="response_d, filesize_d, service_d"),
    filesizes=col(sample, filesize_d),
    responses=col(sample, response_d),
    serviceLevels=col(sample, service_d),
    observations=transpose(matrix(filesizes, responses)),
    model=knnRegress(observations, serviceLevels, 10),
    prediction=predict(model, array(36365, 645)))

 

Issue Links

• is duplicated by: SOLR-13555 Add centeredMovingAvg Stream Evaluator
• is related to: SOLR-10784 Streaming Expressions machine learning functions library