Re: R-beta: restart() in R

Martyn Plummer (plummer@iarc.fr)
Wed, 16 Jul 1997 10:57:37 +0200


Message-Id: <3.0.1.16.19970716105737.3fa709e0@droopy.iarc.fr>
Date: Wed, 16 Jul 1997 10:57:37 +0200
To: <p.baker@fsc.qut.edu.au>, r-help mailing list <r-help@stat.math.ethz.ch>
From: Martyn Plummer <plummer@iarc.fr>
Subject: Re: R-beta: restart() in R

At 11:22 04/07/97, p.baker@fsc.qut.edu.au wrote:

>I just discovered R and it looks great under Windows NT4 or linux! 
>
>I now can't put off learning SPlus. Other than learning S/S+ I also
>was hoping to use R for CODA a S+ MCMC diagnostics package. However, I
>am thwarted by R not having a restart function (and I suspect maybe
>other things too which I'm not aware of!).
>
>Although I suspect it may not be trivial, has anyone looked at making a
>restart function for R or at porting CODA?

I am porting CODA to R but I must confess I'm not doing it with any
great speed. I started by just trying to fix the incompatibilities with
R but my patience snapped fairly quickly and I'm now rewriting and
reorganizing it. Problems I am trying to deal with (apart from lack of
spare time) are

+ The code is really awful.
+ The code is really bloated. I'm trying to shrink it down to a
  reasonable size.
+ There isn't much infrastructure under the menu based interface. I'm
  trying to reorganize CODA as a library of functions which can be
  used by an experienced S user. At the moment there is no way to
  break out of the menu system (CODA was designed for people with no
  knowledge of S).
+ It contains a fair amount of (slightly modified) proprietary
  code from MathSoft.  This was included to allow CODA to be run on
  versions of S-PLUS older than 3.2. I really don't think R users
  should take bits of S-PLUS code just because they happen to be
  useful, so I'll either have to rewrite these functions or (more
  likely) strip them out.

Martyn




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