1) The integration results are in the workspace
rwd x 200x2 3200 matrix
Type x at the octave prompt and they will appear on your screen. You can
also delete the ';' at the end of the following code line, which supresses
the output
x = lsode ("f", x0, t);
2) Your version of octave (on your platform) cannot find the X11 driver. Not
sure why your gnuplot cannot find it as my .gnuplot has no directions on
where to look.
[~] -bash-2.05b 512$ locate gnuplot_x11
/Applications/GnuPlot.app/Contents/Resources/libexec/gnuplot/4.2/gnuplot_x11
/usr/local/libexec/gnuplot/4.0/gnuplot_x11
[~] -bash-2.05b 511$ cat .gnuplot
set mouse
set loadpath "/usr/local/share/gnuplot/demo/" "/usr/local/bin/gnuplot"
Henry
on 9/5/07 11:06 AM, Abdul Rahman Riza at address@hidden 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:
Why there's no integration result?
Why can't I get the plot of the function?
Regards,
Riza
---------------------------------
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Answers
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