Dear R-community, maybe someone can help me with this: I've been using the loess() smoother for quite a while now, and for the matter of documentation I'd like to resolve the acronym LOESS. Unfortunately there's no explanation in the help file, and I didn't get anything convincing from google either. I know that the predecessor LOWESS stands for "Locally Weighted Scatterplot Smoothing". But what does LOESS stand for, specifically? "Locally Weighted Exponential Scatterplot Smoothing"? As far as I understand LOESS is still a local polynomial regression, so that would probably make no sense. Any help appreciated! Thanks in advance, Peter
See http://en.wikipedia.org/wiki/Loess . It is not an acronym: the derivation is given in the reference given by ?loess, p.314. On Mon, 31 May 2010, Peter Neuhaus wrote:> Dear R-community, > > maybe someone can help me with this: > > I've been using the loess() smoother for quite a while now, and for > the matter of documentation I'd like to resolve the acronym LOESS. > Unfortunately there's no explanation in the help file, and I didn't > get anything convincing from google either. > > I know that the predecessor LOWESS stands for "Locally Weighted > Scatterplot Smoothing". But what does LOESS stand for, specifically? > "Locally Weighted Exponential Scatterplot Smoothing"? As far as > I understand LOESS is still a local polynomial regression, so that > would probably make no sense. > > Any help appreciated! > > Thanks in advance, > > Peter-- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
This is the paper on which the loess algorithm is based in general: http://www.econ.pdx.edu/faculty/KPL/readings/cleveland88.pdf The explanation about the origin of the term LOESS is given on page 597. Cheers Joris On Mon, May 31, 2010 at 11:33 AM, Peter Neuhaus <pneuhaus@pneuhaus.de>wrote:> Dear R-community, > > maybe someone can help me with this: > > I've been using the loess() smoother for quite a while now, and for > the matter of documentation I'd like to resolve the acronym LOESS. > Unfortunately there's no explanation in the help file, and I didn't > get anything convincing from google either. > > I know that the predecessor LOWESS stands for "Locally Weighted > Scatterplot Smoothing". But what does LOESS stand for, specifically? > "Locally Weighted Exponential Scatterplot Smoothing"? As far as > I understand LOESS is still a local polynomial regression, so that > would probably make no sense. > > Any help appreciated! > > Thanks in advance, > > Peter > > ______________________________________________ > 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. >-- Joris Meys Statistical Consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control Coupure Links 653 B-9000 Gent tel : +32 9 264 59 87 Joris.Meys@Ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]]
Hi Peter, If this article is correct: http://www.r-bloggers.com/abbreviations-of-r-commands-explained-250-r-abbreviations/ Loess stands for: [LO]cally [E]stimated [S]catterplot [S]moothing Best, Tal ----------------Contact Details:------------------------------------------------------- Contact me: Tal.Galili@gmail.com | 972-52-7275845 Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | www.r-statistics.com (English) ---------------------------------------------------------------------------------------------- On Mon, May 31, 2010 at 12:33 PM, Peter Neuhaus <pneuhaus@pneuhaus.de>wrote:> Dear R-community, > > maybe someone can help me with this: > > I've been using the loess() smoother for quite a while now, and for > the matter of documentation I'd like to resolve the acronym LOESS. > Unfortunately there's no explanation in the help file, and I didn't > get anything convincing from google either. > > I know that the predecessor LOWESS stands for "Locally Weighted > Scatterplot Smoothing". But what does LOESS stand for, specifically? > "Locally Weighted Exponential Scatterplot Smoothing"? As far as > I understand LOESS is still a local polynomial regression, so that > would probably make no sense. > > Any help appreciated! > > Thanks in advance, > > Peter > > > ______________________________________________ > 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. >[[alternative HTML version deleted]]