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Thread Subject: 2nd order differential equation

Subject: 2nd order differential equation

From: Jill

Date: 8 Nov, 2007 03:10:59

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Anyone know if there's a MATLAB function that can be used to
solve 2nd order differential equations? If not, anyone know
how to go about doing that?

Thanks!

Subject: 2nd order differential equation

From: Dan Haeg

Date: 8 Nov, 2007 03:37:20

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"Jill " <udmathworks@mathworks.com> wrote in message
<fgtuo3$a73$1@fred.mathworks.com>...
> Anyone know if there's a MATLAB function that can be used to
> solve 2nd order differential equations? If not, anyone know
> how to go about doing that?
>
> Thanks

ode45 and the other odeXXX solvers can do this.

Subject: 2nd order differential equation

From: Urs

Date: 8 Nov, 2007 09:02:57

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"Jill " <udmathworks@mathworks.com> wrote in message <fgtuo3
$a73$1@fred.mathworks.com>...
> Anyone know if there's a MATLAB function that can be used
to
> solve 2nd order differential equations? If not, anyone
know
> how to go about doing that?
>
> Thanks!

infact, not directly. you have to rewrite the ODE in a
matrix-form:

suppose: x''=F(x,x',t)=ax'+bx+c
rewrite: y=[x, x'], y'=[0 1; b a]*y+[0; c]

HTH
Urs

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