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 o
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
On Fri, Mar 6, 2015 at 9:36 AM, Dirk Eddelbuettel wrote:
>
> Jeff,
>
> Nice writeup and promising idea. From the "gimme numbers" department:
>
> - do you pass the R regression tests?
I made sure that the implementation passed 99% of the tests, however
there were two that gave differing results
Jeff,
Nice writeup and promising idea. From the "gimme numbers" department:
- do you pass the R regression tests?
- what sort of speedups do you see on which type of benchmarks?
When you asked about benchmark code on Twitter, I shared the somewhat
well-known (but no R ...) http://benchmarks
Hi,
I wanted to share with the mailing list members here details about the
project I've been working on:
https://github.com/jeffreyhorner/R-Array-Hash
This is a re-implementation of R's hashed environments, the global
variable cache, the global string cache and symbol table with
cache-conscious
