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From: "Bruno Luong" <b.luong@fogale.findmycountry>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Simple ODE: Linearly Damped Spring Mass System
Date: Wed, 14 Jan 2009 06:21:02 +0000 (UTC)
Organization: FOGALE nanotech
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"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <gkjueb$1ts$1@fred.mathworks.com>...
> "Hydroman S" <amirgsalem@gmail.com> wrote in message <gkjq5e$ph5$1@fred.mathworks.com>...
> > In Matlab, How can I solve a Linear Second Order Homogenous ODE in Matrix form, i.e. 
> > 
> > M x&#8217;&#8217; + C x&#8217; + k x = 0
> > Where M, C, K are 6x6 complex matrices, and x is a function of time. 
> > and some initial conditions, i.e.  x(0)=1. 
> > 
> > I cannot find references that address this problem in the matrix form. Any tips will be appricated. Thanks,
> 
> Why do you need any reference? take a look of doc ODE?? (especially Mass matrix part), your system can be solved by those functions without any further manipulation.
> 
> Bruno

One more remark, I guess your variable x is (6 x 1) vector.

Bruno