Re: Plot command crashes Octave

[Vic Norton]

> On Jul 4, 2016, at 2:40 AM, Sebastian Schöps <address@hidden> wrote:
> 
> However, if you do not care which plot backend is used, then this should fix
> the problem:
> 
> graphics_toolkit('gnuplot')
> figure;
> x=1:10;
> plot(x,sin(x));
> 
> Please let us know if this works.
> 
> Bye
> Sebastian

Hi

A slight modification of your script does not work on my El Capitan Octave
(homebrew version 4.0.2). The problem: octave/gnuplot can only draw
dotted grid lines, which are almost impossible to see with the default
0.5 linewidth. Here is a demonstration script.

% test_octave_graphics.m  - to demonstrate an octave/gnuplot problem
  graphics_toolkit('gnuplot');
  x = 0 : 0.1 : 3.5;
  y = sin(x);
  close all;
  figure;
  plot(x, y);
  axis([0, 3.5, 0, 1.5], "equal");
  set(gca, "xgrid", "on", "ygrid", "on", ...
    "gridlinestyle", "-", ...
    "xtick", [0 : 0.5 : 3.5], ...
    "ytick", [0 : 0.5 : 1.5] ...
  );

Change the first line to
  graphics_toolkit(‘qt’);
and you will see solid grid lines —- as you should.

Regards,

Vic