Re: Octave 4 - Plot Problem

[Ben Abbott]

> On Oct 26, 2015, at 10:19, Marco Atzeri <address@hidden> wrote:
> 
>> 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.

Also, remove the "figure" command. This command will create a second figure 
window which may obscure the first window which was created by the "plot" 
function.

Ben