Re: Octave 4 - Plot Problem

[Marco Atzeri]

On 26/10/2015 10:38, Derek Dickens wrote:
> Hi
>
> I am a totally new user and have just installed Octave 4 as a trial.  I
> am going through some of the early examples from Wiki Books and the
> arithmetic functions work well but when I come to trying a simple plot
> the “figure window” opens but no data is displayed and the window
> “freezes” before the system crashes.  No information on why.
>
> The code is very simple and from Wiki Books:
>
> x = linspace(0,2*pi,100);
>
> y=sin(x);
>
> plot(x,y);
>
> figure;
>
> I have tried the GUI version 4.0 and also the command line version both
> fail at the point of executing the call to  “plot” when the “figure”
> window displays with no plot.
>
> I’m not sure if it is the installation or a configuration issue.  I’m
> using window 7 and Java version 8 – both updated in the last few days.
>
> Any help would be appreciated.
>
> Derek

Hi Derek,
It seems the default graphics_toolkits is not working properly.

Can you try the command

   available_graphics_toolkits

It should produce a list like

ans =
{
  [1,1] = fltk
  [1,2] = gnuplot
}

where the first is the default.
You can select another one with

  graphics_toolkit("gnuplot")
and than retry your example.

Regards
Marco