https://bugs.kde.org/show_bug.cgi?id=471174
João Figueiredo <jf.mun...@gmail.com> changed:
What |Removed |Added
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Resolution|NOT A BUG |---
Status|NEEDSINFO |REPORTED
--- Comment #2 from João Figueiredo <jf.mun...@gmail.com> ---
(In reply to Stefan Gerlach from comment #1)
> Did you select the weights for the data uncertainties to use?
> When i select "Instrumental (1/col²)" and the third column (Y uncertainties)
> for Y-Weight, the fit changes accordingly.
Ohh, I see... So that's what I was missing.
To be fair, I don't think it's very intuitive right now: I add a column with
the uncertainties, and then the only obvious uncertainty-related option I see
on the fitting window is that "Use given data uncertainties" checkbox; I see
that it's checked, so I figure that means it must be using the uncertainties I
previously added (so what does it do, then?).
I never would've guessed I had to manually add them as a weight (and I've been
a proud LabPlot user for years!). Sure, retrospectively, I get the logic: the
uncertainties will be treated as a generic data weight by the fitting algorithm
(more uncertainty = less weight).
But could we perhaps rework things a little so the workflow is slightly more
intuitive? For example, on the dialog that pops up when we attempt to create a
fit from a spreadsheet, we could add a data input for the uncertainty (just
like with X-Data and Y-Data). Then, if a column is selected, we could ask for a
weight (or maybe just set it to "instrumental" by default, that's probably what
most users expect when working with uncertainties).
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