[R] Help re. Fitting non-linear dynamic model to time series data

[Ciaran Roberts]

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.

	
	
	
	 		 	   		  
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