I am Facing problem using ode45

I wrote this in m-file...

function dx=FtnTest(t,x)
    dx=zeros(2,1);
    dx(1)=x(2);
    dx(2)=-52.1480*(-63.8398)*x(2)-(-4.6941e+06)*x(1);

and use

[t,x]=ode45('FtnTest',[0,100],[0,0])
in command window but it generates only the zero column vectors,please guide me about the error...
Thanks

Answer 1

[Roger Stafford]

That is no error. A zero vector is the correct solution to the equations and their zero initial values which you have given them. If the original equation had been

dx(2)=-52.1480+(-63.8398)*x(2)-(-4.6941e+06)*x(1);

with addition instead of multiplication in the leftmost operation, then you would obtain a different result. It looks as though that is what you might have meant.

[Muhammad Usman]

Thankx