Hello,
Stephan van den Akker a écrit :
Hello,
I just put in 2 votes for issue 20819, because I would like the
polynomial regression curve added to the chart module of OOo, or to Calc
itself.
I need polynomial regression curves to determine calibration curves for
gas flow meters used in the laboratory at work. These meters are known
to have second order polynomial calibration curves (y = a + b·x + c·x²).
The parameters a, b, and c from these calibration curves have to be
determined regularly from third party calibration measurements.
@Laurent and Ingrid: I don't understand what you mean by "exponential
terms". If you can explain, I will ask around at work if there is a need
for them.
What is the planned time-frame for the file format change? Is it already
part of the draft ODF 1.2 specification?
Greetings,
Stephan van den Akker
Many thanks for your interest in polynomial regression curve !
Exponential terms was proposed by Laurent Godard in his marco CorelPoly
: http://oooconv.free.fr/fitoo/download/CorelPoly.sxc
It concerns equations like y = a + b.exp(x) + c.exp(2.x) + d.exp(3.x)...
No news about integration in ODF 1.2 specification. May be Ingrid have
some information ?
Laurent BP
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