Re: Examples doesn't seems to work

[Søren Hauberg]

Abdul Rahman Riza skrev:
> Dear All,
>
> I just installed octave and run an examples in 
> http://www.gnu.org/software/octave/doc/interpreter/Simple-Examples.html#Simple-Examples
>
> After invoke this command:
>
> octave:1> function xdot = f (x, t);
> >  r = 1.4;
> >  k = 1.4;
> >  a = 1.5;
> >  b = 0.16;
> >  c = 0.9;
> >  d = 0.8;
> >  xdot(1) = r*x(1)*(1 - x(1)/k) - a*x(1)*x(2)/(1 + b*x(1));
> >  xdot(2) = c*a*x(1)*x(2)/(1 + b*x(1)) - d*x(2);
> >  endfunction
> octave:2> x0 = [1; 2];
> octave:3> t = linspace (0, 50, 200)';
> octave:4> x = lsode ("f", x0, t);
> octave:5> plot (t, x)
> octave:6> Expected X11 driver: /usr/lib/gnuplot/gnuplot_x11
> Exec failed: No such file or directory
> See 'help x11' for more details
>
>
> My Question:
>
>    1. Why there's no integration result?
I don't understand the question. Doesn't the variable 'x' contain the 
integration result?

>    2. Why can't I get the plot of the function?
It looks like a gnuplot problem to me. Reading the error message tells 
you that you don't have an X11 terminal for gnuplot. Perhaps you 
installed gnuplot without X support?

Søren