Dnia środa, 11 kwietnia 2012 13:26:43 Prof Brian Ripley pisze: > On 11/04/2012 12:42, Duncan Murdoch wrote: > > On 12-04-11 12:43 AM, Křištof Želechovski wrote: > >> <URL: > >> http://finzi.psych.upenn.edu/R/library/datasets/html/morley.html> > >> > >> "The classical data of Michaelson and Morley on the speed of light" > >> > >> Can you provide more information about the data? How were they > >> obtained, > >> etc.? I do not have the book "Genstat Primer" and the nearest location > >> where > >> it is available is University of York which is rather far from my > >> location. > > > > If you can't find the cited reference, I'd try Google. For instance, it > > led me to this page > > > > http://en.wikipedia.org/wiki/File:Michelsonmorley-boxplot.svg > > > > which appears to show five series. > > Yes, but that is derived from R. > > AFAIR the history, Bill Venables got this from Weekes (1986), a book I > have only ever seen in Adelaide. A better reference is > > S. M. Stigler (1977) Do robust estimators work with real data? > Annals of Statistics 5, 1055–1098. (See Table 6.)
The data in R are identical with Table 6 but they were not obtained by Michaelson and Morley; they were obtained by Michelson. The description is wrong. It is also a problem in R itself, as evidenced by the following instruction: data(morley) Of course, you can name a data set whatever you like, even data(marilyn) would be all right, but may I suggest that this data set be renamed to michelson? Please fix, Chris ______________________________________________ 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.
