Re: [R] non-linear fourth-order differential equations

Hi Yanika, more information about deSolve (books, papers, tutorials) can be found on the deSolve homepage: http://desolve.r-forge.r-project.org and, of course, in the package documentations. If you need further help from the list, please provide a short reproducible example. Thomas Petzold

Re: [R] non-linear fourth-order differential equations

Hi Yanika, Depending on whether your problem is an initial value problem or a boundary value problem, you can find solution methods in R-packages deSolve (IVP) and bvpSolve (BVP). The solvers in deSolve only solve differential equations written in first-order form; bvpSolve can handle higher-orde

Re: [R] non-linear fourth-order differential equations

Hi Ravi, Thank you for your correction. I hope I didn't mess up anything:) Cheers. Wu - A R learner. -- View this message in context: http://r.789695.n4.nabble.com/non-linear-fourth-order-differential-equations-tp3062805p3063761.html Sent from the R help mailing list archive at Nabble.co

Re: [R] non-linear fourth-order differential equations

elp-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Wu Gong Sent: Sunday, November 28, 2010 6:31 PM To: r-help@r-project.org Subject: Re: [R] non-linear fourth-order differential equations Hi Yanika, Please try ?uniroot and ?ployroot f <- function(x) x^4-16 uniroot(f, lo

Re: [R] non-linear fourth-order differential equations

Hi Yanika, Please try ?uniroot and ?ployroot f <- function(x) x^4-16 uniroot(f, lower= -3, upper=0) polyroot(c(-16,0,0,0,1)) - A R learner. -- View this message in context: http://r.789695.n4.nabble.com/non-linear-fourth-order-differential-equations-tp3062805p3062894.html Sent from the R