Re: Plot looking bad

[Huub]

Hi Andy,

On 10.12.2014 14:04, Huub wrote:

Using Fedora 21 and Octave 3.8.2 on a pc with nVidia video NV34 chipset,
I want to do a simple plot:
x = linspace(0, pi);
plot(sin(2*x));
Instead of a sine plot, I get the result in the attachment. I got a
similar result using Fedora 20 with same Octave version. Does this mean
that Octave (or plot) doesn't support this video chipset anymore ?

The default graphics_toolkit is FLTK which uses OpenGL to draw plots.

Is your OpenGL setup okay? Does "glxinfo | grep direct" show "direct
rendering: Yes". 

Yes, it does.

Can you run "glxgears" without problems? 

Yes, I can.

What version is your libfltk? 

find /usr -name libfltk*
/usr/lib/libfltk_gl.so.1.3
/usr/lib/libfltk_images.so.1.3
/usr/lib/libfltk.so.1.3
/usr/lib/libfltk_forms.so.1.3

What happens if you move the window out of the screen
and back again?

Stays the same, but as replied earlier: changing to gnuplot works.