Interesting! I get nice convergence in both 32 and 64 bit systems on 2.13.0. I agree the older versions are a bit of a distraction. The inconsistent behaviour on current R is a concern.
Maybe Philip, Uwe, and I (and others who might be interested) should take this off line and see what is going on. I'll offer to act as tabulator of results and have set up a temporary wiki on http://macnash.telfer.uottawa.ca/PBettProb to allow tries to be saved for comparison. Needs a login to "write". Please use username=Ruser password=statistics Hopefully there won't be wikispam, or I'll have to close it off. JN On 06/20/2011 06:00 AM, r-help-requ...@r-project.org wrote: > Date: Mon, 20 Jun 2011 11:25:54 +0200 > From: Uwe Ligges <lig...@statistik.tu-dortmund.de> > To: p.e.b...@dunelm.org.uk > Cc: r-help@r-project.org, Philip Bett <pb...@astro.uni-bonn.de> > Subject: Re: [R] different results from nls in 2.10.1 and 2.11.1 > Message-ID: <4dff1222.7040...@statistik.tu-dortmund.de> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Since one is a 32-bit and the other one a 64-bit, and therefore the > compiler is also different, you can get different numerical results > easily, even with identical versions of R (and most of us do not have > outdated R installations around). > > I just tried your example on 3 different systems with R-2.13.0 and all > told me "singular convergence"... > > Uwe Ligges > > ______________________________________________ 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.
