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https://issues.apache.org/jira/browse/MATH-341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831690#action_12831690
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Roger BAll commented on MATH-341:
---------------------------------
Looking at "See for example http://demonstrations.wolfram.com/RungesPhenomenon/
" it seems that if you select Chebyshev sample points the error drops
dramatically all along the curve. Is this an option in the apache math library?
> Test for firsst Derivative in PolynomialFunction ERROR
> ------------------------------------------------------
>
> Key: MATH-341
> URL: https://issues.apache.org/jira/browse/MATH-341
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: Roger BAll
> Attachments: FirstDerivativePolyNomTest.java
>
>
> I have written the attached test using our data for generating a curve
> function
> However the first derivative test fails see:
> testfirstDerivativeComparisonFullPower
> Either my test is in error or there is a bug in PolynomialFunction class.
> Roger Ball
> Creoss Business Solutions
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