Berend Hasselman <bhh <at> xs4all.nl> writes: > > > On 22-03-2012, at 18:37, mhimanshu wrote:
> > How to find best parameter values for deSolve function?? > > > > I assume you mean the deSolve package which has many options. > > I would suggest predicting which way the wind will blow the > day after tomorrow. > > Berend I think this is a less-well-worded repeat of this question: http://article.gmane.org/gmane.comp.lang.r.general/258611 which is not unreasonable, but no-one's gotten around to answering it yet. (Terse answer: construct a function that takes the parameters of the ODE, and the initial conditions if you don't know them but estimate them at the same time, solves the ODE numerically, and computes a goodness-of-fit score (actually a badness of fit score, such as the sum of squares or negative log-likelihood), and use it as the objective function in optim().) Ben ______________________________________________ R-help@r-project.org mailing list 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.
