[Maxima] how do I get rk to do anything?

[Jaime E. Villate]

On Wed, 2007-01-24 at 12:02 -0500, Dan Solomon wrote:
> I have prepared a 3 vector, dxdt, a function of x, and an initial  
> vector (called init).  Then I issue
> 
> rk(dxdt,x,init,[t,0,.1,1.]);

x cannot be a function. It should also be a vector, with 3
undefined variables that tells rk which are the 3 independent
variables.

Please look at
http://maxima.sourceforge.net/docs/manual/en/maxima_49.html
and let me know if there is something confusing or poorly written
in the documentation for rk.

Thanks for using rk.

Regards,
Jaime