Re: [R] Nonlinear regression

From: <Bill.Venables_at_csiro.au>
Date: Wed, 21 May 2008 10:16:56 +1000

There is no question that SAS is a monumental piece of software that has served the statistical community well for a very long time. No question at all in my mind of that. There is an ugly side to it though. Possibly unconsciously, it tries to make its culture and customs a kind of standad for the statistical profession, and some of those customs and cultural features are, to put it as mildly as possible, rather unhelpful.

As I said quite a few years ago now, 'SAS seems to be to statistical computing what Microsoft is to personal computing'. Or at least it tries to be, sadly.

W.

-----Original Message-----
From: Spencer Graves [mailto:spencer.graves_at_pdf.com] Sent: Wednesday, 21 May 2008 10:03 AM
To: Venables, Bill (CMIS, Cleveland)
Cc: LXu_at_hnrg.com; r-help_at_r-project.org
Subject: Re: [R] Nonlinear regression

      Let's not be so hard on SAS. I thought it was marvelous when I first used it over 30 years ago.

      Spencer Graves

Bill.Venables_at_csiro.au wrote:
> ?nls
>
> (I always knew SAS *is* a DUD, but never that it has a DUD too...)
>
>
> Bill Venables
> CSIRO Laboratories
> PO Box 120, Cleveland, 4163
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> -----Original Message-----
> From: r-help-bounces_at_r-project.org
[mailto:r-help-bounces_at_r-project.org]
> On Behalf Of LXu@hnrg.com
> Sent: Wednesday, 21 May 2008 9:23 AM
> To: r-help_at_r-project.org
> Subject: [R] Nonlinear regression
>
> Could someone help me on the following:
> SAS has DUD (Does not Use Derivatives) for nonlinear regression.
>
> Does "R" has a similar capability?
>
> I am not good at derivatives and may get my derivative wrong before
> feeding it to a nonlinear regression procedure.
>
> Any help would be much appreciated.
>
> Liu
> Hancock Forest Management NZ
> Tokoroa, New Zealand
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> lxu_at_hnrg.com
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed 21 May 2008 - 00:21:07 GMT

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