[Pkg-kde-extras] Bug#974566: Bug#974566: labplot: Labplot fails to perform curve fitting with custom functions

[Pino Toscano]

Hi Marcel,

In data giovedì 12 novembre 2020 11:24:09 CET, Marcel Ilg ha scritto:
> it semms that labplot has some issues with it's curve fitting uttility.
> 
> When trying to fit a curve based on data from a table it succedes when using
> one of the provided basic functions but when using a custom function it's not
> able to perform the fit. The field where the custom equation is written stays
> red and the fit does not succede.
> Additionally after trying to perform a custom fit, it is impossible to fit
> any curve using a predefined fit model like polinomials. No fit will appear
> and the constants stay at their starting value.
> 
> To recreate this:
> Open labplot, create new document, create new table, put values into the table,
> make a plot from the table data, switch off the lines of the plot and use
> symbols instead, try to fit the curve (if there is some basic function selected
> the fit will succede here), try to fit using custom equation 
> 
> Result:
> No fit will be performed, the field where the custom equation is written stays
> red. After this action fits using predefined model curves
> like polynomials will also not be performed.

I just uploaded labplot 2.8.1 (mostly a bugfix release) to unstable,
and hopefully it should be available in the archive in 4 hours or so.
Once it is updated for you, can you please try again with the new
version?
In case the issue still persists with the new version, can you please
report the bug directly to the upstream developers? See the page
https://labplot.kde.org/support/ with pointers.

Thanks,
-- 
Pino Toscano
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