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[Octave-bug-tracker] [bug #44963] Wrong plotting with fltk, according to
From: |
Rafael Laboissiere |
Subject: |
[Octave-bug-tracker] [bug #44963] Wrong plotting with fltk, according to values in the data |
Date: |
Thu, 30 Apr 2015 00:08:24 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36 |
URL:
<http://savannah.gnu.org/bugs/?44963>
Summary: Wrong plotting with fltk, according to values in the
data
Project: GNU Octave
Submitted by: rlaboiss
Submitted on: Thu 30 Apr 2015 12:08:22 AM GMT
Category: Plotting
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 4.0.0-rc4
Operating System: GNU/Linux
_______________________________________________________
Details:
This issue has been reported as a bug against the Debian package octave
(http://bugs.debian.org/783624).
Using the data in the file attached to this bug report (data.mat), the plot
with gnuplot produces a correct result (see attached file gnuplot.pdf):
load data.mat
close all
graphics_toolkit ("gnuplot")
plot (data (:, 1), data (:, 2))
However, the result is clearly wrong with fltk (see atached file fltk.pdf):
load data.mat
close all
graphics_toolkit ("fltk")
plot (data (:, 1), data (:, 2))
Also, the labels on the vertical axis appear at the wrong places.
This is due to a bad conditioning of the data and the problem disappears when
the data on the horizontal axis is translated:
load data.mat
close all
graphics_toolkit ("fltk")
plot (data (:, 1) - data (1, 1), data (:, 2))
This seems to be a bug in the fltk graphics backend.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Thu 30 Apr 2015 12:08:22 AM GMT Name: data.mat Size: 1kB By:
rlaboiss
<http://savannah.gnu.org/bugs/download.php?file_id=33840>
-------------------------------------------------------
Date: Thu 30 Apr 2015 12:08:22 AM GMT Name: fltk.pdf Size: 5kB By:
rlaboiss
<http://savannah.gnu.org/bugs/download.php?file_id=33841>
-------------------------------------------------------
Date: Thu 30 Apr 2015 12:08:22 AM GMT Name: gnuplot.pdf Size: 6kB By:
rlaboiss
<http://savannah.gnu.org/bugs/download.php?file_id=33842>
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?44963>
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- [Octave-bug-tracker] [bug #44963] Wrong plotting with fltk, according to values in the data,
Rafael Laboissiere <=