From tlumley@u.washington.edu  Thu Aug 22 16:39:59 2002
From: tlumley@u.washington.edu (Thomas Lumley)
Date: Thu, 22 Aug 2002 08:39:59 -0700 (PDT)
Subject: Symbolic differentiation ("D","deriv", etc.) (PR#1928)
In-Reply-To: <200208221245.OAA14923@pubhealth.ku.dk>
Message-ID: <Pine.A41.4.44.0208220836271.93374-100000@homer16.u.washington.edu>

On Thu, 22 Aug 2002 lylek@utk.edu wrote:

> Full_Name: Lyle W. Konigsberg
> Version: 1.5.1
> OS: Windows
> Submission from: (NULL) (160.36.64.99)
>
>
> I apparently found an error in how "deriv" puts a derivative to the screen
> (though the internal representation is correct).  Here's what I was doing for a
> class example:

Yes, it's the same as bugs 1119, 1797 and 1637 and probably some others.
The deparse doesn't always put parentheses in correctly.


	-thomas

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._


Symbolic differentiation ("D","deriv", etc.) (PR#1928)
Thomas Lumley