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  1. Solr
  2. SOLR-10685

Add Fast Cosine Transform and Inverse Fast Cosine Transform Stream Evaluators

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Details

    • New Feature
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • streaming expressions
    • None

    Description

      The fast cosine transform Stream Evaluator can be used to smooth non-stationary time series data.

      Syntax:

      fast cosine transform:

      a = fct(colA)

      Inverse fast cosine transform:

      a = fcti(colA)

      FCT implementation provided by Apache Commons Math.

      Attachments

        1. SOLR-10685.patch
          7 kB
          Joel Bernstein

        Issue Links

          is related to

          New Feature - A new feature of the product, which has yet to be developed. SOLR-10651 Streaming Expressions statistical functions library

          • Major - Major loss of function.
          • Closed

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              jbernste Joel Bernstein
              jbernste Joel Bernstein
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              Dates

                Created:
                Updated: