Message-ID: <loom.20051027T204351-582@post.gmane.org>
Date: 2005-10-27T18:46:05Z
From: Woodrow Setzer
Subject: Fitting of Non-Linear Diff Equations and Parameter Estimation
Raja Jayaraman <rajnmsu79 <at> gmail.com> writes:
>
> Hello Everybody,
> I am running R 2.2.0 with Windows XP
> i am trying to fit nonlinear differential equation to data sets which looks
> like this:
[SNIP]
> and i need to fit these data to the following diff equation:
> dNdt=a*N-b*N*C, dCdt=N^2,
> Where a=birth rate, b=death rate and N= Current count, C= Cumulative Count.
> i need to fit the differential equation, solve and obtain parameters a,b.
> can someone help with this,
> Thanks
> Raj
Try looking at the package odesolve for solving the ode system.
Woody Setzer
National Center for Computational Toxicology
US EPA