https://issues.apache.org/ooo/show_bug.cgi?id=125823
Issue ID: 125823
Issue Type: ENHANCEMENT
Summary: Equation shows "Inf" in special exponential regression
curve
Product: General
Version: 4.1.1
Hardware: All
OS: Windows 7
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: chart
Assignee: [email protected]
Reporter: [email protected]
Created attachment 84156
--> https://issues.apache.org/ooo/attachment.cgi?id=84156&action=edit
Wrong term in case of overflow
Open attached document. It contains left, top a chart with a regression curve
equation. This equation contains "Inf" indicating, that there is an overflow.
In similar case of underflow, we have decided, to show f(x)=exp(r+sx) instead
of f(x)=a*exp(bx). Similar form of equation should be used on overflow too.
The reason of the huge values is, that the x-values are dates and dates are
used with there internal numbers. For "normal" x-values, there is no problem,
see the right examples in the attached file.
The relevant code is in file ExponentialRegressionCurveCalculator.cxx in method
ExponentialRegressionCurveCalculator::ImplGetRepresentation
Dear core developer, please do not fix it yourself, but leave it as starting
task for newcomers.
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