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From: Gary on 1 Dec 2009 23:39

I am trying to work a state space solution and am getting errors in Matlab. This is being done by using ode45 to plot the solutions for the state variables (x1,x2).

Given:

A = [ 0 1 ; 2 4]
B = [ 0 2]
C = [1 0] % x1 and x2 refers to x1 = 1 and x2 = 0
D = [0]

Code:

x0= [1 0]
A=[-10 1; -0.02 -2]

for t=0:0.01:10
% x=exp(t*A)*x);
end

[t,y]=ode45 (@vdp1,[0 20], [20])
plot (x,t)
hold on
plot(t,y(:,1))
@vdp1
edit @vdp1


If you are unable to understand state space, can you please give a working example of using ode45 to plot matrices etc.

Thanks.
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