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https://issues.apache.org/jira/browse/MATH-1632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17425467#comment-17425467
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Gilles Sadowski commented on MATH-1632:
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bq. [...] constrained spline interpolator [...] does not overshoot values like
free cublic splines do.
How does it compare with the already implemented [Akima
interpolator|https://gitbox.apache.org/repos/asf?p=commons-math.git;a=blob;f=commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/analysis/interpolation/AkimaSplineInterpolator.java;h=2d1520d29b79ad01aea423ee404cf01481eadfb1;hb=HEAD]?
> Constrained Spline Interpolator
> -------------------------------
>
> Key: MATH-1632
> URL: https://issues.apache.org/jira/browse/MATH-1632
> Project: Commons Math
> Issue Type: New Feature
> Affects Versions: 3.6.1
> Reporter: Gili
> Priority: Major
>
> Please add a constrained spline interpolator implementation.
> A description can be found at
> [https://pages.uoregon.edu/dgavin/software/spline.pdf]
> An existing Java implementation can be found at
> [https://jetcracker.wordpress.com/2014/12/26/constrained-cubic-spline-java/]
> Justification: This interpolation does not overshoot values like free cublic
> splines do.
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