numerical solutions to matrices??
- Subject: [mg2761] numerical solutions to matrices??
- From: snowdall at rodin.colorado.edu (Clark Snowdall)
- Date: Wed, 13 Dec 1995 02:02:51 -0500
- Approved: usenet@wri.com
- Distribution: local
- Newsgroups: wri.mathgroup
- Organization: University of Colorado
I'm in a bit of a jam. I have a system: phi'[t] == A.phi[t] that I have to numerically solve. Both A and phi[t] are 18x18 matrices, A is composed completely of real numbers (mainly zeros), and I need to solve it for phi at various times and for various initial conditions for phi. I tried the Runge-Kutta programming example that came with my version of Mathematica and while it worked for 4x4 matrices it choked on an 18x18. It's needed for an orbit determination program that I am writing (in a desparate effort to pass a class). If anyone knows how to solve a problem like this OR knows anything about orbit dtermination using Mathematica I would VERY much appreciate it. Thanks!!