Posted by wonkuyn noh on May 16, 1998 at 12:14:28:
In Reply to: non-linear differential equations posted by Emmanuel DESVOIVRES on February 20, 1998 at 09:03:16:
: I need to solve a system of 4 non linear differential
: equations. The 4 equations look like this:
: dYi/dt=f(Yi) i=1,4
: the derivatives are evaluated numerically, by using only
: the Yi. I mean that t is not used to compute the derivatives.
: I use a first order method (Euler...) and I wonder if an
: higher order method (and subroutine) exists for that kind
: of equations.
: I tried the classical fourth order Runge-Kutta method, but it
: doesn't work, because the time t is not use for the
: evaluation of the derivatives.
: Could someone help me?
: thank you!