Re: Examples doesn't seems to work

[David Bateman]

Abdul Rahman Riza wrote:
> 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?
>    2. Why can't I get the plot of the function?
> 
> Regards,
> Riza
> 

Try installing gnuplot properly, its only half there as its missing the
gnuplot_x11. As you didn't tell us what platform or OS you are running
we can't give you any information on how to go about installing
gnuplot_x11..

D.