MathGroup Archive 2003

[Date Index] [Thread Index] [Author Index]

Search the Archive

System of ODE

  • To: mathgroup at smc.vnet.net
  • Subject: [mg41960] System of ODE
  • From: "Amedeo" <wallpeer at libero.it>
  • Date: Wed, 11 Jun 2003 13:17:51 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello everyone....
I want to solve a sytem of ordinary differential equation....the coefficent
of this system are Matrices....I try to find in help but I don't find any
result....

the system is  in this form

 A'[t] = D[t]*A[t]+2*C with a initial condition A[0] = {0,0}
and t's gap {t,0,300}

I try to write this with NDSolve but it return me a error
NDSolve[{A'[t] = D[t]*A[t]+2*C,A[0] = {0,0}},A,{t,0,300}]

Naturally D[t] is a matrix 2x2 and C is a columm of 2 element

the dimension of matric  D and C are ok
but i don't know if i should declare A[t] as a variable matrices....

the error that return NDSolve is

NDSolve::deql : The First argument must have both an equation and an initial
condition.

thanx for help
-- 
AMS
Michelin@ingegneriaPOINTunimePOINTit



  • Prev by Date: help on Font!
  • Next by Date: Re: help with 3D scatter plot
  • Previous by thread: help on Font!
  • Next by thread: Re: System of ODE