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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 created by the derivative function. 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. (was: Currently the *derivative* Stream Evaluator operates over
functions (spline, lerp, akima, loess, polyfit, oscillate etc...). It would be
useful if the *derivative* function could operate directly over a vector.)
> Allow derivatives to be computed from 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
> created by the derivative function. 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.
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