https://bugs.kde.org/show_bug.cgi?id=379101
Bug ID: 379101
Summary: custom fitting fails
Product: LabPlot2
Version: unspecified
Platform: MS Windows
OS: MS Windows
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: alexander.se...@web.de
Reporter: uwesto...@web.de
Target Milestone: ---
- install LP 2.4 under Windows
- create a new spreadsheet and fill 2 columns with row numbers
- create a worksheet
- create there an xy-plot
- add there a xy-curve
- use the menu Analysis -> Data fitting in the spreadsheet
- use a custom fit function, for example "exp(a*x)"
result: the "a" is not recognized as fit variable and does therefore not occur
in the parameters list. There I see 2 variables named "c0" and "c1". So one has
to add the "a" there manually and delete the "c" parameters. This is
time-consuming and annoying. (MagicPlot and Origin recognizes the fit
parameters automatically.)
However,
- use for the parameter "a" as start value "1" and press recalculate
result: one gets this:
a = 1±nan (nan %)
but more severe is that the plot is overlayed with an empty fit. So fitting is
just useless because I of course want to see the fit result I the plot.
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