bugGNU Octave - Bugs: bug #45823, Empty plot after figure command...


bug #45823: Empty plot after figure command (FLTK only)

Submitter:  Marco Caliari <caliari>
Submitted:  Tue 25 Aug 2015 02:54:30 PM UTC
Category:  Plotting with OpenGL Severity:  4 - Important
Priority:  3 - Low Item Group:  Regression
Status:  Works For Me Assigned to:  None
Originator Name:  Open/Closed:  * Closed
Release:  * 4.0.0 Operating System:  * GNU/Linux
Fixed Release:  None Planned Release:  None
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Wed 10 Aug 2016 04:09:21 AM UTC, comment #2: 

This works for me with the development code.  It probably got fixed somewhere in the last year, or an upgrade to the FLTK libraries did it.  Closing report.

Rik <rik5>
Project Administrator
Tue 25 Aug 2015 05:04:01 PM UTC, comment #1: 

Confirmed.  It's an annoyance, and probably difficult to actually track down and fix.

Here are some workarounds:

1) Use 'refresh' on the command line following the plot command.

2) Change the comma-separated line 'figure, plot (x,x)' in to two separate commands separated by a newline rather than a comma

plot (x,x)

3) Put the command in an m-file and run the m-file.

Contents of tstmfile.m

x = linspace (0,1);
figure, plot (x,x)

4) Switch to a different toolkit such as gnuplot rather than FLTK.

5) Start with 'octave --no-gui'.  This has a CLI interface, but the default toolkit is qt rather than FLTK.

Rik <rik5>
Project Administrator
Tue 25 Aug 2015 02:54:30 PM UTC, original submission:  

Dear all,

if I run octave-cli and type


the plot appears immediately, but if I then type


I get an empty and transparent window (see attachment) and I have to double click on it to see the content. No problem with


This happens since I installe 4.0.0 PPA (trusty).


Marco Caliari <caliari>
Project Member


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    Follow 7 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-08-10 rik5 StatusConfirmed Works For Me
        Open/ClosedOpen Closed
    2016-07-01 rik5 Severity3 - Normal 4 - Important
    2015-08-25 rik5 Priority5 - Normal 3 - Low
        StatusNone Confirmed
        SummaryEmpty plot after figure command Empty plot after figure command (FLTK only)
    2015-08-25 caliari Attached File- Added Screenshot from 2015-08-25 16:52:05.png, #34723

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