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[Octave-bug-tracker] [bug #37553] datetick generates strange tick mark l
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #37553] datetick generates strange tick mark locations |
Date: |
Thu, 11 Oct 2012 23:46:18 +0000 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101 Firefox/15.0.1 |
URL:
<http://savannah.gnu.org/bugs/?37553>
Summary: datetick generates strange tick mark locations
Project: GNU Octave
Submitted by: None
Submitted on: Thu 11 Oct 2012 11:46:18 PM UTC
Category: Plotting
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Assigned to: None
Originator Name: dkruger
Originator Email: Dov,address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 3.6.2
Operating System: Microsoft Windows
_______________________________________________________
Details:
I built a small data file to demonstrate datetick. Data is plotted for
October 10, 2012 at hours from 0100 to 1300. Here is the data:
2012 10 9 01 00 00 47
2012 10 9 02 00 00 46.5
2012 10 9 03 00 00 45
2012 10 9 04 00 00 45.2
2012 10 9 05 00 00 45.3
2012 10 9 06 00 00 46
2012 10 9 07 00 00 46.5
2012 10 9 08 00 00 47.6
2012 10 9 09 00 00 48.2
2012 10 9 10 00 00 49.8
2012 10 9 11 00 00 51.2
2012 10 9 12 00 00 53.5
2012 10 9 13 00 00 54.7
2012 10 9 14 00 00 56.9
The following code generates a graph that shows
m=load("temp20121009.dat");
t = datenum(m(:,1:6));
this generates the following Julian dates. The differences look fine, an hour
is 0.04166666
735151.041666667
735151.083333333
735151.125000000
735151.166666667
735151.208333333
735151.250000000
735151.291666667
735151.333333333
735151.375000000
735151.416666667
735151.458333333
735151.500000000
735151.541666667
735151.583333333
However, when plotted:
plot(t, m(:,7))
the numbers generate odd spacing. They are all equally spaced.
Seems like a bug in the autoselection of tick locations.
This problem does not happen with integral number of days.
_______________________________________________________
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- [Octave-bug-tracker] [bug #37553] datetick generates strange tick mark locations,
anonymous <=