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https://issues.apache.org/jira/browse/SOLR-13776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-13776:
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Description: The *derivative* Stream Evaluator operates over functions
(spline, lerp, akima, loess, polyfit, oscillate etc...), but does not work with
the function returned by the derivative function itself. This means a spline
needs to be wrapped around the derivative to take a second derivative. This
ticket will allow the derivative function to be applied directly to output of
the derivative function, by internally wrapping a spline around derivative
function that was passed in. (was: The *derivative* Stream Evaluator operates
over functions (spline, lerp, akima, loess, polyfit, oscillate etc...), but
does not work with the function returned by the derivative function itself.
This means a spline needs to be wrapped around the derivative to take a second
derivative. This ticket will allow the derivative function to applied directly
to output of the derivative function, by internally wrapping a spline around
derivative function that was passed in.)
> Allow derivatives to be computed for derivatives
> ------------------------------------------------
>
> Key: SOLR-13776
> URL: https://issues.apache.org/jira/browse/SOLR-13776
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Priority: Minor
>
> The *derivative* Stream Evaluator operates over functions (spline, lerp,
> akima, loess, polyfit, oscillate etc...), but does not work with the function
> returned by the derivative function itself. This means a spline needs to be
> wrapped around the derivative to take a second derivative. This ticket will
> allow the derivative function to be applied directly to output of the
> derivative function, by internally wrapping a spline around derivative
> function that was passed in.
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