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Posted to issues@openoffice.apache.org by bu...@apache.org on 2012/07/31 15:38:18 UTC

[Bug 120419] strange cubic smoothing algorithm

https://issues.apache.org/ooo/show_bug.cgi?id=120419

Regina Henschel <rb...@t-online.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |rb.henschel@t-online.de
         Resolution|---                         |INVALID

--- Comment #1 from Regina Henschel <rb...@t-online.de> ---
That is no error but the property of cubic splines. Your given points have the
coordinate (1|1) (2|5) and (3|4). An interpolating polynom for your given
points is y = -2.5 * x^2 + 11.5 * x - 8. And that polynom has its maximum at
x=2.25 with a maximum value of 5.125

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