Re: How can I "perturbate" a NDSolve expresion?
- To: mathgroup at smc.vnet.net
- Subject: [mg102039] Re: [mg102000] How can I "perturbate" a NDSolve expresion?
- From: "David Park" <djmpark at comcast.net>
- Date: Mon, 27 Jul 2009 05:56:05 -0400 (EDT)
- References: <13419912.1248595700145.JavaMail.root@n11>
But then wouldn't A be a function of t, which you could define with a Piecewise statement? David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ From: Iv=E1n Lazaro [mailto:gaminster at gmail.com] Hi all! I'm trying to make a perturbation to a equation while NDSolve is doing his job. Suppose the equation is x'[t]=A*F(x[t]); where A is a parameter matrix, and x'[t] are n-dimensional variables; i need that when integration time is, for example, 10, the parameters change in some amount. Another posibility is that each time step I generate a random number, and if it is less than 0.001, the parameters change in some amount. Is it possible using NDSolve, or I have to write the integrator routine? Thanks!