hi,

does anybody knows how can I use the fchamp command. The help example

is not so clear to me. I could not identify the mathematical function

expressed by:

deff("[xdot] = derpol(t,x)",..

["xd1 = x(2)";..

"xd2 = -x(1) + (1 - x(1)**2)*x(2)";..

"xdot = [ xd1 ; xd2 ]"])

If anybody can help me with two very easy examples:

y'=3+2y

y'=3t+2y

Thanks,

Henrique

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2. Ordinary Differential Equation System

Hi,

is there a way to solve a system of 3 oridinary differential

equations in matlab with an analytical way? Is there such an

algorithm? There are no initial values for the equations, so a

numerical method can not be applied.

Thank you for your time

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