[Libreoffice-bugs] [Bug 134224] Pie chart data rounding error

2020-09-01 Thread bugzilla-daemon
https://bugs.documentfoundation.org/show_bug.cgi?id=134224

Heiko Tietze  changed:

   What|Removed |Added

 CC|libreoffice-ux-advise@lists |heiko.tietze@documentfounda
   |.freedesktop.org|tion.org
   Keywords|needsUXEval |

--- Comment #5 from Heiko Tietze  ---
1.4+1.4+1.4 = 4.2 ~ 4 = 1+1+1 = 3
1.6+1.6+1.6 = 4.8 ~ 5 = 2+2+2 = 6

Usually the individual values are rounded but the last which takes up the
remaining portion to 100.

1.4+1.4+1.4 = 4.2 ~ 4 = 1+1+2 = 4 # rnd(4.2)-(1+1)=2
1.6+1.6+1.6 = 4.8 ~ 5 = 2+2+1 = 5 # rnd(4.8)-(2+2)=1

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[Libreoffice-bugs] [Bug 134224] Pie chart data rounding error

2020-08-31 Thread bugzilla-daemon
https://bugs.documentfoundation.org/show_bug.cgi?id=134224

NISZ LibreOffice Team  changed:

   What|Removed |Added

   Keywords||needsUXEval
 CC||libreoffice-ux-advise@lists
   ||.freedesktop.org

--- Comment #4 from NISZ LibreOffice Team  ---
(In reply to Leyan from comment #3)
> The rounding of each percentage is correct, the fact that the sum is 101 is
> just an artifact of the insufficient precision displayed. So the question is
> whether it is better to have less precise individual values and a nicer
> total or whether the current behavior should be kept?
> 
Hi

Thanks for your comment. Yes this is exactly the question here. 
Adding UX-advise list for help to decide :).

(snip)

> This simple algorithm can lead to pie charts displaying different
> percentages even if the underlying value is the same, which is not great in
> my opinion. For example, with a pie chart with 3 identical parts, the
> percentages displayed will be 34%, 33%, 33%.

Just like in Excel. My hunch is that our users would prefer it this way, so
that on papers printed from Excel/Calc would be no difference. 
But this behavior might be made configurable, so that (enterprise)
users/sysadmins could centrally configure Excel-like behavior.

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[Libreoffice-bugs] [Bug 134224] Pie chart data rounding error

2020-08-30 Thread bugzilla-daemon
https://bugs.documentfoundation.org/show_bug.cgi?id=134224

Leyan  changed:

   What|Removed |Added

 CC||ouyang.le...@hotmail.com

--- Comment #3 from Leyan  ---
The rounding of each percentage is correct, the fact that the sum is 101 is
just an artifact of the insufficient precision displayed. So the question is
whether it is better to have less precise individual values and a nicer total
or whether the current behavior should be kept?

I played a bit with it in Excel, this is only applied for integer percentage
values, not when there is additional precision displayed. A pie chart with
three identical parts will sum to 100% when the display format is 0% but 99.9%
when it is 0.0%. 

For these integer percentage values, the algorithm used seems to be to change
the displayed value by 1 for as many labels as necessary, starting with the
labels closest to 0.5. 

This simple algorithm can lead to pie charts displaying different percentages
even if the underlying value is the same, which is not great in my opinion. For
example, with a pie chart with 3 identical parts, the percentages displayed
will be 34%, 33%, 33%.

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[Libreoffice-bugs] [Bug 134224] Pie chart data rounding error

2020-06-22 Thread bugzilla-daemon
https://bugs.documentfoundation.org/show_bug.cgi?id=134224

Xisco FaulĂ­  changed:

   What|Removed |Added

 Ever confirmed|0   |1
 CC||xiscofa...@libreoffice.org
 Status|UNCONFIRMED |NEW

--- Comment #2 from Xisco FaulĂ­  ---
Reproduced in

Version: 7.1.0.0.alpha0+
Build ID: 70479e1f4cb3c120f46239a648e65f035af2922d
CPU threads: 4; OS: Linux 4.19; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded

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[Libreoffice-bugs] [Bug 134224] Pie chart data rounding error

2020-06-22 Thread bugzilla-daemon
https://bugs.documentfoundation.org/show_bug.cgi?id=134224

--- Comment #1 from NISZ LibreOffice Team  ---
Created attachment 162298
  --> https://bugs.documentfoundation.org/attachment.cgi?id=162298=edit
Screenshot of the original document side by side in Word and Writer

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