On Jan 28, 2008 1:25 PM, Greg Snow <[EMAIL PROTECTED]> wrote: > I had heard the same thing about Florence Nightingale, but it seems that this > is a confusion of different graphs. > > Nightingale developed a graph based on a circle, but all the angles were > equal and the different values were encoded by using different radii of the > slices (and she did the right thing by having the radius proportional to the > square root of the value). She never named this plot, but I have seen > coxcomb (Nightingale refered to the document in which this graph first > appeared as the coxcomb) or rotogram used as names. At first glance this may > be confused for a pie chart, hence the credit, but in truth I think > Nightingale is innocent of the crime of creating the first pie chart. >
"An example of "Stigler's Law of Eponomy" (Stigler, 1980), Nightingale's Coxcomb chart did not orignate with her, though this should not detract from her credit. She likely got the idea from William Farr, a close friend and frequent correspondent, who used the same graphic principles in 1852. The earliest known inventor of polar area charts is Andre-Michel Guerry (1829)." --- Michael Friendly via http://www.math.yorku.ca/SCS/Gallery/historical.html Hadley -- http://had.co.nz/ ______________________________________________ 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.
