[6448] in s-news-athena
Re: second derivatives
daemon@ATHENA.MIT.EDU (Douglas Bates)
Wed Feb 15 11:43:55 1995
Date: Wed, 15 Feb 95 10:17:33 -0600
From: bates@stat.wisc.edu (Douglas Bates)
To: Gerhard.Paass@gmd.de
Cc: s-news@utstat.toronto.edu, paass@borneo.gmd.de
In-Reply-To: <199502150734.AA02672@sein.gmd.de> (message from Gerhard Paass on Wed, 15 Feb 1995 08:34:04 +0100)
>>>>> Gerhard Paass <Gerhard.Paass@gmd.de> writes:
> To perform variance calculations I look for a function - similar to
> deriv - which determines the second partial derivatives of an S-PLUS
> expression with respect to a given variable. The function should
> generate an S-PLUS expression implementing the second derivative.
David Smith's deriv3 contribution to statlib does what you wish.
These functions are included in the code from Venables and Ripley's
book "Modern Applied Statistics with S-Plus".
