# [R] Euler & Runge-Kutta

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Mon Nov 7 20:16:21 CET 2016

```Google is your friend "R Runge kutta" [1][2]

This actually is not the "do my research for me" list... when you have a specific problem with R, this is a good place to get help by providing a reproducible example. You are expected to have some reasonable familiarity with the theory underlying the task you are working on and with basic R syntax so we can focus on where R is not doing what you want.

Why are you interested in Euler AND Runge-Kutta? Why aren't you just interested in solving the DEs to within some uncertainty?

[1] https://www.jstatsoft.org/article/view/v033i09/v033i09.pdf
[2] https://cran.r-project.org/web/views/DifferentialEquations.html
--
Sent from my phone. Please excuse my brevity.

On November 7, 2016 9:26:12 AM PST, Tom Mosca <tom at vims.edu> wrote:
>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)
>
>
>
>
>	[[alternative HTML version deleted]]
>
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