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Solves ordinary and delay differential equations, where the objective function is written in either R or C. Suitable only for nonstiff equations, the solver uses a 'DormandPrince' method that allows interpolation of the solution at any point. This approach is as described by Hairer, Norsett and Wanner (1993) <ISBN:3540604529>. Support is also included for iterating difference equations.
Package details 


Author  Rich FitzJohn [aut, cre], Wes Hinsley [aut], Imperial College of Science, Technology and Medicine [cph] 
Maintainer  Rich FitzJohn <rich.fitzjohn@gmail.com> 
License  MIT + file LICENSE 
Version  1.0.5 
URL  https://github.com/mrcide/dde 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

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