| Author |
Comment/Response |
Kaitlin
|
 12/06/12 4:21pm
Hello,
I have an extremely complicated non-linear system of equations that I would like to solve using some kind of numerical method. I basically have three equations and three unknowns, k2, k3 and c3 that look something like this (greatly simplified for illustration):
-2.25*10^8+c3*k2-0.6k2^2-6.077*10^7*c3*k3-105823*k2*Sqrt[2.30*10^8-c3^2/12048.7525*k2^2]+etc, on the order of 20-40 terms =0
I have tried and failed miserably at solving for any term to substitute it into the other two equations. I think I need to use FindRoot[{eqn1==0,eqn2==0,eqn3==0},{{k2,k2guess},{k3,k3guess},{c3,c3guess}}] but
a) Do I just put in the equations, or do I also need the ==0 part?
b) Do my equations need to be functions for this to work?
c) Is there a way to make these equations into functions and try and get a better idea of their behavior so I have a chance of making a guess?
If anyone has ideas or a sample code for solving non-linear systems of equations they could point me to, I would appreciate it!
Thanks,
Kaitlin
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