CorelPolyGUI-0.3.1

CorelPolyGUI
by:

• Marcin Gutman
  mgutman(at)op(dot)pl
• Laurent Balland-Poirier
  jumbo4444(at)yahoo(dot)fr
• Laurent Godard
  oooconv(at)free(dot)fr
• Björn Vennberg
  m95vebj(at)googlemail(dot)com

Fit a polynomial regression curve to (X,Y) data: (*)

• [a⋅x^i], [a⋅exp(x⋅i)], [a⋅x+b] models (**)
• negative degrees possible
• force intercept option [Y(0) = a0]
• give polynomial equation and determination coefficient
• plot experimental points and calculated curve

(*) Based on CorelPoly.sxc by Laurent Godard
http://oooconv.free.fr/fitoo/fitoo_en.html

(*) Issue 20819
http://qa.openoffice.org/issues/show_bug.cgi?id=20819

(**) Issue 34093
http://qa.openoffice.org/issues/show_bug.cgi?id=34093

Changelog

• This version is the same as suspended 0.3.0 except bug-fixes for French translation
• Following changes are related to 0.2.1
• Added:
• more numerically stable method (QR decomposition)
• OOo's LINEST() function with force Y(0,F) option for linear case
• translation functions
• French and Polish locale

Known problems

• "QR decomposition" stops working in case of [number of points] = [max. deg. + 1]
  This is a problem with "vect_norm" function. It doesn't affect another cases.