Dear Sir,

I am trying to run the following script in octave:

# Integrate t^2 from t=1 to t=3
function xdot = f (x, t)
   xdot(1) = t ^ 2;
endfunction
x0=1;
t = linspace (0, 3, 10)';
x = lsode ("f", x0, t)
plot(x,t)


I saved it as testing.m. When I type the name of the file in the
octave command line, it tells me there is and undefined statement. This is
the error that Octave is showing me in the command line:


>>testing
error: `t' undefined near line 3 column 14
error: evaluating binary operator `^' near line 3, column 16
error: evaluating assignment expression near line 3, column 12
error: called from `testing' in file `/octave_files/testing.m'
>>


Can you please tell me what I am doing wrong? The programme does not
seem to have any error at all. I have run every single line of the
programme (one by one) on the octave command line and there is no problem.

Please let me know what is the problem,

Thanks,  Fernando