Define the ODE equals the matrix. Runge Kutta 4
2 views (last 30 days)
Show older comments
I have velocity vector in matrix form [ 1, 2, 3,4 ];
Velocity is dx/dt 1) first matlab function f = func(t,x)
f= [1,2,3,4]
2) Second matlab
dt=0.001;
t=[0:dt:20];
xinital= [ 0 0 -2 0.4]
use the Runge Kutta to estimate the final x
for i = 1: 20/dt
k1 = dt*func(t(i),x(i));
k2 = dt*func(t(i)+dt/2,x(i)+dt*k1/2);
k3 = dt*func(t(i)+dt/2,x(i)+dt*k2/2);
k4 = dt*func(t(i)+dt,x(i)+dt*k3);
x(2,:) =xintial(1,:) + (k1 + 2*k2 + 2*k3 + k4)/6;
end
I keep getting error message dimension mismatch on xinitial.
Please help
0 Comments
Accepted Answer
Babak
on 7 Aug 2012
Change
xinital= [ 0 0 -2 0.4]
to
xinital= [ 0 0 -2 0.4]'
or
xinital= [ 0;0;-2;0.4]
0 Comments
More Answers (0)
See Also
Categories
Find more on Ordinary Differential Equations in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!