MATLAB Central Newsreader - 2nd order differential equation

2nd order differential equation

Jill — Thu, 08 Nov 2007 03:10:59 -0500

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!

Re: 2nd order differential equation

Dan Haeg — Thu, 08 Nov 2007 03:37:20 -0500

"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.

Re: 2nd order differential equation

Urs — Thu, 08 Nov 2007 09:02:57 -0500

"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