[Libreoffice-bugs] [Bug 139856] CALC CHART Trend Lines for moving average not being "smoothed" similarly to Polynomial Trend Lines

bugzilla-daemon at bugs.documentfoundation.org bugzilla-daemon at bugs.documentfoundation.org
Sat Jan 23 11:55:12 UTC 2021


https://bugs.documentfoundation.org/show_bug.cgi?id=139856

--- Comment #2 from Tomaz Vajngerl <quikee at gmail.com> ---
Actually none of the trend lines are smoothed but they look smooth because they
are transformed into an approximated function, which is then sampled for
drawing. 

That's not the case for moving average, which is different kind of transform,
which results in averages of input values, not a function.

So the question is if we should allow to also "smooth" that line or not. For
example Excel doesn't - you can smooth a data line, but not a trend line.

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