Crynodeb

DisgrifiadMichelsonmorley-boxplot.svg	Boxplot representing Michelson's data on the speed of light. It consists of five experiments, each made of 20 consecutive runs.
Dyddiad	28 Rhagfyr 2006
Ffynhonnell	Gwaith yr uwchlwythwr
Awdur	User:Schutz
SVG genesis InfoField	The SVG code is valid.   This chart was created with R.

This data is not from the Michelson-Morley experiment but from Michelson's measurement of the speed of light. See MICHELSON, A. A. (1882). Experimental determination of the velocity of light made at the United States Naval Academy, Annapolis. Astronomic Papers 1 pp. 109-145 U.S. Nautical Almanac Office, or S. M. Stigler (1977) Do robust estimators work with real data? Annals of Statistics 5, 1055–1098.

Original upload by User:Schutz

Boxplot representing Michelson's data on the speed of light. It consists of five experiments, each made of 20 consecutive runs. Note that the oblique line is incorrect, and probably due to a bug in the Mediawiki software/SVG converter. The graphic was created by User:Schutz for Wikipedia on 28 December 2006, using the R statistical project. The program that generated the graphic is given below; the data and the idea are from the R help page for the morley dataset (see help(morley)). The graph was exported in postscript format, converted to SVG using the pstoedit command, and the layout was slightly modified using Inkscape before upload.

 
  data(morley)
  morley$Expt <- factor(morley$Expt)
  morley$Run <- factor(morley$Run)
  attach(morley)

  postscript("Michelsonmorley-boxplot.ps", paper="special", height=6, width=6,
             horizontal=F)
  par(las=1)
  par(mar=c(5.1, 5.1, 2.1, 2.1))
  par(font=2)
  par(font.axis=2)
  boxplot(Speed ~ Expt, xlab = "Experiment No.", ylab="Speed of light (km/s minus 299,000)")
  abline(h=792.458, lty=3)
  dev.off()
  

New upload by User:Mwtoews

Boxplot representing Michelson's data on the speed of light. It consists of five experiments, each made of 20 consecutive runs.

The graphic was originally created by User:Schutz for Wikipedia on 28 December 2006, using the R statistical project. The program that generated the graphic is given below; the data and the idea are from the R help page for the morley dataset (see help(morley)). The graph was exported in PDF format, converted to SVG using Adobe Illustrator, and the layout was slightly modified using Vim before upload.

data(morley)
morley$Expt <- factor(morley$Expt)

pdf("Michelsonmorley-boxplot.pdf", height=6, width=6)
par(las=1, mar=c(5.1, 5.1, 2.1, 2.1))
boxplot(Speed ~ Expt, morley, xlab = "Experiment No.",
        ylab="Speed of light (km/s minus 299,000)")
abline(h=792.458, col="red")
text(3,792.458,"true\nspeed")
dev.off()

Trwyddedu

Yr wyf fi, deiliad hawlfraint y gwaith hwn, yn ei ryddhau i'r parth cyhoeddus, a hynny'n fyd-eang. Hwyrach nad yw hyn yn bosib yn ôl cyfraith rhai gwledydd; os felly: Rwyn rhoi i unrhywun yr hawl i ddefnyddio'r gwaith hwn at unrhyw ddiben, heb unrhyw amodau, oddieithr unrhyw amodau gofynnol yn ôl y gyfraith.

The creator and uploader also believes that this graphic is a trivial work which does not qualify for copyright.

Reference

• A. J. Weekes (1986) A Genstat Primer. London: Edward Arnold.