[MM stumbling over on old thread ... he'd be interested]
GaGr == Gabor Grothendieck ggrothendi...@gmail.com
on Wed, 15 Apr 2009 09:53:18 -0400 writes:
GaGr Not sure if this is sufficient for your needs but R does include
symbolic
GaGr differentiation, see ?D, and the Ryacas and
Martin (see below) gives a good explanation of the difference between AD and
symbolic
differentiations. I'm of the opinion we can use both. However, the real issue
as far
as I'm concerned (from an optimizer's point of view, which may also be that of
ODE and
PDE folk) is that right now none of
On Tue, May 19, 2009 at 9:08 AM, Martin Maechler
maech...@stat.math.ethz.ch wrote:
[MM stumbling over on old thread ... he'd be interested]
GaGr == Gabor Grothendieck ggrothendi...@gmail.com
on Wed, 15 Apr 2009 09:53:18 -0400 writes:
GaGr Not sure if this is sufficient for your needs
#
-Original Message-
From: Gabor Grothendieck [mailto:ggrothendi...@gmail.com]
Sent: Tuesday, May 19, 2009 2:58 PM
To: Martin Maechler
Cc: John C Nash; r-devel@r-project.org; Forth, Shaun
Subject: Re: [Rd] Automatic Differentiation for R
On Tue, May
In efforts to improve optimization tools for R, one of my
interests has been getting automatic differentiation capabilities
so that analytic rather than numerical derivatives can be used. They
would be helpful in several other areas besides optimization, My timings
show
factors of the order of
Not sure if this is sufficient for your needs but R does include symbolic
differentiation, see ?D, and the Ryacas and rSymPy
packages interface R to the yacas and sympy computer algebra
systems (CAS) and those system include symbolic differentiation.
http://ryacas.googlecode.com
