bugGNU Octave - Bugs: bug #53647, Order of plot commands xlabel,...

 
 

bug #53647: Order of plot commands xlabel, hold & plot fcts

Submitted by:  Charles Praplan <charprap>
Submitted on:  Sat 14 Apr 2018 07:23:13 AM UTC  
 
Category:  Plotting with OpenGL Severity:  3 - Normal
Priority:  3 - Low Item Group:  Incorrect Result
Status:  Confirmed Assigned to:  None
Originator Name:  Charles Praplan Open/Closed:  Open
Release:  4.2.2 Operating System:  Microsoft Windows

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Sat 14 Apr 2018 01:09:14 PM UTC, comment #2:

For someone who comes along later and is debugging this, the problem is the axes object position property which is not set correctly.

Using

will restore a normal-looking plot.

Rik <rik5>
Project Administrator
Sat 14 Apr 2018 01:07:46 PM UTC, comment #1:

Yes it does. Best practice for Octave is to first plot your data, and then annotate the graph with labels, titles, etc. If you reverse the order of the code it works just fine.

As an added bonus, there is no need to use the 'hold on' command since xlabel will not clear the figure window. So the shorter, working code is

Marking this as confirmed since it is reproducible, but lowering the priority since there is a simple workaround.

Rik <rik5>
Project Administrator
Sat 14 Apr 2018 07:23:13 AM UTC, original submission:

Following code produces a buggy figure!

figure;
fs=1e6;
xlabel('Time [s]');
hold on;
plot([1:1000]/fs, [1:1000].^2);

Remarks :

- this happens with 'qt' and 'fltk' graphics_toolkit
- ok with fs=1e5
- ok without "xlabel('Time [s]');"
- ok without "hold on"

Charles Praplan <charprap>

 

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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-04-14 rik5 CategoryPlotting => Plotting with OpenGL
        Priority5 - Normal => 3 - Low
        Item GroupNone => Incorrect Result
        StatusNone => Confirmed
        Summaryxlabel, hold & plot fcts => Order of plot commands xlabel, hold & plot fcts

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