Re: [R] Fitting of Non-Linear Diff Equations and Parameter Estimation

From: Woodrow Setzer <>
Date: Fri 28 Oct 2005 - 04:46:05 EST

Raja Jayaraman <rajnmsu79 <at>> 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:
> 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 mailing list PLEASE do read the posting guide! Received on Fri Oct 28 05:13:14 2005

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