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https://issues.apache.org/jira/browse/SOLR-10685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-10685:
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Attachment: SOLR-10685.patch
> Add Fast Cosine Transform and Inverse Fast Cosine Transform Stream Evaluators
> -----------------------------------------------------------------------------
>
> Key: SOLR-10685
> URL: https://issues.apache.org/jira/browse/SOLR-10685
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Fix For: 7.1
>
> Attachments: SOLR-10685.patch
>
>
> The fast cosine transform Stream Evaluator can be used to smooth
> non-stationary time series data.
> Syntax:
> fast cosine transform:
> {code}
> a = fct(colA)
> {code}
> Inverse fast cosine transform:
> {code}
> a = fcti(colA)
> {code}
> FCT implementation provided by Apache Commons Math.
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