Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Primer funkcije: Metoda Runge-Kutta 4. reda<br />
function [t, x] = rkutta4( F, tp, tf, x0, T )<br />
% Metod integracije RUNGE-KUTTA 4. reda<br />
% parametri su isti kao kod ode23,<br />
% sem T koje predstavlja korak integracije<br />
if nargin < 5, T = 0.1; end<br />
t = tp : T : tf;<br />
n = length(t);<br />
x = zeros( n, length(x0) );<br />
x(1,:) = x0(:)';<br />
tl = tp;<br />
for i = 1 : n-1<br />
tl = tl + T;<br />
xp = x(i,:)';<br />
k1 = T * feval( F, tl, xp );<br />
k2 = T * feval( F, tl+0.5*T, xp+0.5*k1 );<br />
k3 = T * feval( F, tl+0.5*T ,xp+0.5*k2 );<br />
k4 = T * feval( F, tl+T, xp+k3 );<br />
x(i+1,:) = x(i,:) + (k1/6 + k2/3 + k3/3 + k4/6)';<br />
end