bugGNU Octave - Bugs: bug #47788, plotting jagged line with large...

 
 

bug #47788: plotting jagged line with large numbers; datetick generates large tic marks

Submitted by:  Guan <xyzhaoguan>
Submitted on:  Tue 26 Apr 2016 06:39:37 PM UTC  
 
Category: Plotting with OpenGLSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Inaccurate Result
Status: DuplicateAssigned to: None
Originator Name: Open/Closed: Closed
Release: 4.0.2Operating System: Any

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Tue 26 Apr 2016 06:53:19 PM UTC, comment #1:

Thanks for the thorough bug report. Yes, this is a known limitation of the OpenGL plotting capabilities of Octave at this point. See bug #32980 (and its other duplicates) for more background.

Mike Miller <mtmiller>
Project Administrator
Tue 26 Apr 2016 06:39:37 PM UTC, original submission:

I guess there is a roundup error in OpenGL plotting engine.

The following code generates ugly plots.

xt = 700000:0.1:700001
yt = 8000000:0.1:8000001
plot(xt,yt,'.-'); %% jagged line, tics are not equally spaced

xt = 700000:0.1:700001
yt=2:0.1:3
plot(xt,yt,'.-') %% jagged line
datetick('x',15) %% datetick generates long tick marks

This happens for both QT and fltk in windows 7.

Guan <xyzhaoguan>

 

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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Tue 26 Apr 2016 06:53:19 PM UTCmtmillerStatusNone=>Duplicate
      Open/ClosedOpen=>Closed
      Operating SystemMicrosoft Windows=>Any
      Dependencies-=>Depends on bugs #32980

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