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:[EMAIL PROTECTED] Sent: Wednesday, 21 May 2008 10:03 AM To: Venables, Bill (CMIS, Cleveland) Cc: [EMAIL PROTECTED]; r-help@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 [EMAIL PROTECTED] 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 > AUSTRALIA > Office Phone (email preferred): +61 7 3826 7251 > Fax (if absolutely necessary): +61 7 3826 7304 > Mobile: +61 4 8819 4402 > Home Phone: +61 7 3286 7700 > mailto:[EMAIL PROTECTED] > http://www.cmis.csiro.au/bill.venables/ > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of [EMAIL PROTECTED] > Sent: Wednesday, 21 May 2008 9:23 AM > To: r-help@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 > DDI: 07-8850387 > Mobile: 021-1576178 > A/H: 06 868 4288 > [EMAIL PROTECTED] > > > The information contained in this email and any attachments is strictly > confidential and is for the use of the intended recipient. Any use, > dissemination, distribution, or reproduction of any part of this email > or > any attachment is prohibited. If you are not the intended recipient, > please notify the sender by return email and delete all copies including > > attachments. > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > 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. > > ______________________________________________ > R-help@r-project.org mailing list > 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. > ______________________________________________ R-help@r-project.org mailing list 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.
