[Octave-bug-tracker] [bug #45604] Windows XP Octave 4.0.0 plot crashes

[Dan Sebald]

Follow-up Comment #2, bug #45604 (project octave):

Something certainly doesn't seem correct.  For Qt, on linux, outside of not
crashing the behavior is very similar.  There is a long delay and then a plot
appears which has presumably 1000 curves at the location x=1000 sequencing
though the various colors.  When the mouse cursor is positioned over one of
the data "points"/"curves" the following warning message appears:

warning: opengl_selector::select: selection buffer overflow

With the FLTK toolkit I see a long delay but no such warning as for the Qt
toolkit.  And once the data is in the window on the screen, scaling/redrawing
is very quick.

I generated an intermediate gnuplot ASCII file using "drawnow()" and that
loads into gnuplot very quickly.

So either Octave is doing something slow, or the data transfer is slow.  But
seeing as Qt takes a long time as well, Octave is doing something slow when it
comes to generating 1000 individual curves.  But the slowness and crash may be
unrelated.

I don't understand your second comment.  Did you mean gnuplot/fltk crash also?
 Be sure to make sure the graphics toolkit is active in the window by doing:

graphics_toolkit('gnuplot');
figure;

because otherwise graphics_toolkit() doesn't necessarily change the property
of the existing window, which would remain as Qt.


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