Hello Tom Mosca, Re:
> Can someone help me with R code to perform approximations to second order > differential equations and systems of first order differential equations > using Euler's method and Runge-Kutta? I am not a student and this is not for > a test or graded assignment. > > Examples (unrelated to each other): > > h = 0.1 > > 1. 3(t^2)y'' - 5ty' + 5y = 0 > y(1) = 0, y'(1) = 2/3 > > 2. Lotka-Volterra > x' = x(3-y) > y' = y(x-3) > For solving differential equations, the famous "lsoda" solver is best, far better than the simple Euler method, and also better than Runge & Kutta. Angels, or very nice people, implemented solving methods using the lsoda into R. Download the package "deSolve" and the world of numerical solutions is at your feet. Succes, Franklin ----- Franklin Bretschneider Dept of Biology Utrecht University brets...@xs4all.nl ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
