ortant it may be to avoid cancellation,
I still would be willing to add to the "derivatives table" in
R's C source if people like you provided a (tested!) patch to
the source, which is in
https://svn.r-project.org/R/trunk/src/library/stats/src/deriv.c
Martin
> From
Lewis; r-devel@r-project.org
Subject: Re: [Rd] Wish List: Extensions to the derivatives table
On 17/02/2017 1:59 PM, Jerry Lewis wrote:
> The derivative table resides in the function D. In S+ that table is
> extensible because it is written in the S language. R is faster but less
> flexib
On 17/02/2017 1:59 PM, Jerry Lewis wrote:
The derivative table resides in the function D. In S+ that table is extensible
because it is written in the S language. R is faster but less flexible, since
that table is programmed in C. It would be useful if R provided a mechanism
for extending th
), quote(pi)),
make.call("^", make.call("cospi", expr[[2]]), 2)),
Jerry
From: Avraham Adler [mailto:avraham.ad...@gmail.com]
Sent: Friday, February 17, 2017 4:16 PM
To: Jerry Lewis; r-devel@r-project.org
Subject: Re: [Rd] Wish List: Extensions to the derivatives table
Hi.
Un
Hi.
Unless I'm misremembering, log, exp, sin, cos, and tan are all handled in
deriv3. The functions listed are specially coded slightly more accurate
versions but can be substituted with native ones for which deriv/deriv3
will work automatically. I believe that if you write your functions using
The derivative table resides in the function D. In S+ that table is extensible
because it is written in the S language. R is faster but less flexible, since
that table is programmed in C. It would be useful if R provided a mechanism
for extending the derivative table, or barring that, provide
