Is anyone interested in writing a package for this? I know that there is C++ code available (written by Fike himself). I can help to the extent of my knowledge, which is very minimal in terms of C++, but I am willing to do testing and other kinds of tasks. Please contact me offline, if there is any interest.
Thanks & Best, Ravi ________________________________________ From: Duncan Murdoch <murdoch.dun...@gmail.com> Sent: Friday, March 6, 2015 3:31 PM To: Ravi Varadhan; r-devel@r-project.org Subject: Re: [Rd] Hyper-dual numbers in R On 06/03/2015 11:18 AM, Ravi Varadhan wrote: > Hi, > Has anyone in R core thought about providing "hyper-dual numbers" in R? > Hyper-dual (HD) numbers, invented by Jeffrey Fike at Stanford, are useful for > computing exact second-order derivatives (e.g., Hessian). HD numbers are > extensions of complex numbers. They are like "quaternions" and have 4 parts > to them (one real and 3 non-real). They seem to be available in Julia. > Obviously, the HD numbers involve a lot more book keeping. Why would you limit this to R core? Seems like something a package could provide. After all, we have other packages extending the number system, e.g. Rmpfr. Duncan Murdoch > http://adl.stanford.edu/hyperdual/ > > Thanks, > Ravi ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
