Re: Example in manual doesn't work?

[Hermann Flaschka]

Hi Thomas,

Yes, Octave wasn't running in its usual directory. Once I cd'd, lsode
worked fine.  I've caught such errors many times before, but not this
time. I'm sorry for the trouble.

Thanks
Hermann

On Sep 12, 2007, at 9:55 AM, Thomas Treichl wrote:

> Hermann Flaschka schrieb:
> > Sorry, I meant to add that I am running OS X 10.4.10
> > on a MacBookPro.
> > Hermann
>
> Hi Hermann,
>
> I think that you've saved your file somewhere, where somewhere  
> means it is not in your 'path'. Type 'pwd' in Octave and have a  
> look where you currently are, type 'path' and have a look which  
> paths are searched for *.m files, then 'cd' into the directory  
> where your f.m is and run your example again. Or you can use the  
> 'addpath' command to set up your path where f.m is placed. I can't  
> see any problem running that example:
>
> octave-2.9.13:2> function xdot=f(x,t)
> > xdot=zeros(3,1);
> > xdot(1)=77.27*(x(2)-x(1)*x(2)+x(1)-8.375e-06*x(1)^2);
> > xdot(2)=(x(3)-x(1)*x(2)-x(2))/77.27;
> > xdot(3)=0.161*(x(1)-x(3)); endfunction
> octave-2.9.13:3> t=linspace(0,500,1000);
> octave-2.9.13:4> x0=[4;1.1;4];
> octave-2.9.13:5> y=lsode("f",x0,t);
> octave-2.9.13:6> plot (t,y)
>
>   Thomas