[Libreoffice-bugs] [Bug 127517] Libreoffice Calc Trendline R^2 value calculation goes wrong when trendline is forced through 0

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=127517

--- Comment #5 from Leyan <ouyang.leyan at hotmail.com> ---
I had a look in the code, this is deliberate. A specific computation was
introduced to reproduce the behavior of the LINEST function, by replacing the
difference to the average by the difference to the constant to intercept:

* The original bug is here:
https://bugs.documentfoundation.org/show_bug.cgi?id=73374
* The commit made to solve it is here:
https://github.com/LibreOffice/core/commit/9e67015be6e9e53e19466117d692de17c18463da

The LINEST function also gives R2=0.985148.

In Excel (Office365), the LINEST function answers 0.985148 and the chart R2 is
0.9373.

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