[Libreoffice-bugs] [Bug 35712] add polynomial regression type

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35712

Laurent BP <jumbo4444 at yahoo.fr> changed:

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                 CC|                            |jumbo4444 at yahoo.fr

--- Comment #1 from Laurent BP <jumbo4444 at yahoo.fr> 2011-08-23 09:41:32 PDT ---
Hello,

To get polynomial regression, you better use CorelPoly macro from Laurent
Godard (same page as FitOOo) which is simpler than FitOOo. A correction of this
macro is proposed on issue 20819
http://openoffice.org/bugzilla/show_bug.cgi?id=20819

Actually, you may use CorelPolyGUI extension, which a graphic user interface
quite convivial to build polynomial regression curve.
http://extensions.services.openoffice.org/en/project/CorelPolyGUI

SLAMLib extension propose also some functions (POLYFIT, POLYVAL) to get a
polynomial regression.
http://extensions.services.openoffice.org/en/project/SLAMLib

To solve this issue, file format must be modified to store information about
regression: other regressions (linear, exponential,...) use only two terms in
their equation. Polynomial equation require a variable number of terms. So do
we have to wait that ODF specification is modified, or can LibO extend ODF
specification to store this information?

A file format modification has been proposed to OASIS to include these
parameter in December 2008, but it had no effect.

It is one of the most wanted feature in Chart. What could help to get this
implemented?

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