Ciaran Roberts
2014-Dec-22 20:14 UTC
[R] Help re. Fitting non-linear dynamic model to time series data
Hey I'm trying to fit the non-linear dynamical model as shown in the image to some time series data. The idea is also to utilize k-fold cross validation to estimate the prediction error. The term Po will be assumed to be constant over a certain timer period and will have to be estimated for each time period. I have extensive experience coding but limited experience in R. I understand what I'm trying to do but am unfamiliar with the packages or how to fit the model and utilize k-fold cross validation, especially for time series data. Any help/guidance would be really appreciated. -------------- next part -------------- A non-text attachment was scrubbed... Name: model.png Type: image/png Size: 9631 bytes Desc: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20141222/32e7a243/attachment.png>
Bert Gunter
2014-Dec-23 05:12 UTC
[R] Help re. Fitting non-linear dynamic model to time series data
Hey, read and follow the posting guide -- go through a tutorial or two, post some code and data, perhaps. Also check out CRAN's time series task view here: http://cran.r-project.org/web/views/TimeSeries.html. You might also try stats.stackexchange.com , as this seems to have more to do with statistics than R coding. Cheers, Bert Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Mon, Dec 22, 2014 at 12:14 PM, Ciaran Roberts <ciaranroberts at hotmail.com> wrote:> Hey I'm trying to fit the non-linear dynamical model as shown in the > image to some time series data. The idea is also to utilize k-fold cross > validation to estimate the prediction error. The term Po will be > assumed to be constant over a certain timer period and will have to be > estimated for each time period. > > > I have extensive experience coding but limited experience in R. I > understand what I'm trying to do but am unfamiliar with the packages or > how to fit the model and utilize k-fold cross validation, especially > for time series data. > > > Any help/guidance would be really appreciated. > > > > > > ______________________________________________ > R-help at 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. >