On Fri, 2005-04-01 at 17:00 +0200, Martyn Plummer wrote: > On Fri, 2005-04-01 at 09:30 +0200, Martin Maechler wrote: > > >>>>> "dream" == dream home <[EMAIL PROTECTED]> > > >>>>> on Wed, 30 Mar 2005 12:27:08 -0800 writes: > > > > dream> Dear R experts, Did someone implemented French Curve > > dream> yet? Or can anyone point me some papers that I can > > dream> follow to implement it? > > > > Are you talking about "splines" ? > > > > I vaguely remember having read that in the distant past, splines > > were sometimes called "French curves". > > I found this: > > G. Wahba and S. Wold, "A completely automatic french curve: Fitting > splines by cross validation," Commun. Statist., vol. 4, no. 1, pp. 1-17, > 1975. > > I remember that my father had a French curve: it was a plastic template > used for drawing which had several smooth edges of varying curvature. > You could use it to draw a wide variety of curved shapes. No doubt the > French called it something else.
http://mathworld.wolfram.com/FrenchCurve.html Martyn, My dad had one as well, along with his slide rule...then he later "moved up" to a TI DataMath as I recall... ;-) These days he is retired (was a medical school professor) and works on a G5. Best regards, Marc ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
