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[Octave-bug-tracker] [bug #59370] Plotting produces wrong output or take
From: |
T Knauss |
Subject: |
[Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit |
Date: |
Tue, 27 Oct 2020 12:45:06 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0 |
URL:
<https://savannah.gnu.org/bugs/?59370>
Summary: Plotting produces wrong output or takes long time,
depending on graphics toolkit
Project: GNU Octave
Submitted by: tknauss
Submitted on: Tue 27 Oct 2020 04:45:04 PM UTC
Category: Plotting with OpenGL
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Release: 5.2.0
Discussion Lock: Any
Operating System: Microsoft Windows
_______________________________________________________
Details:
1) Create a Matrix from these values:
S = [0.966087133253521,
0.966087134195414,
0.966087134195414,
0.966087148503056,
0.966087148503056,
0.966087174908003,
0.966087174908004,
0.966087191418938,
0.966087191418939,
0.966087204808544,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808545,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087204808546,
0.966087217807083,
0.966087217807083]
2) Execute "plot(S)".
If the graphics toolkit is "qt" (seems to be the default, queried after the
first test), the output is wrong. See attached screenshot.
If the graphics toolkit is "gnuplot" (chosen before the next test), the output
seems to be correct, but it takes about 10 seconds with full load on 1 CPU
core and about 30 more seconds with no CPU activity until the plot is
displayed.
In "fltk", it seems to be correct and is shown instantly.
After switching back to "qt", the output seems to be correct, too, but it also
takes time now.
Actually, it seems to become slower after every change of the graphics
toolkit.
The behaviour can be reproduced by restarting Octave. The delay is not always
reproducible.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Tue 27 Oct 2020 04:45:04 PM UTC Name: octave@bug@-@plot(S)@with@qt.png
Size: 9KiB By: tknauss
<http://savannah.gnu.org/bugs/download.php?file_id=50138>
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?59370>
_______________________________________________
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- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit,
T Knauss <=
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, T Knauss, 2020/10/27
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, Philip Nienhuis, 2020/10/27
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, Pantxo Diribarne, 2020/10/27
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, T Knauss, 2020/10/28
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, Markus Mützel, 2020/10/28
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, T Knauss, 2020/10/28
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, Markus Mützel, 2020/10/28
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, T Knauss, 2020/10/28
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, Rik, 2020/10/29
- [Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit, T Knauss, 2020/10/30