how about: require(splines) x<-1:5 y <- c(0.31, 0.45, 0.84, 0.43, 0.25) yy <-predict(interpSpline(x, y)) plot(x, y) lines(yy)
---- Katharine Mullen mail: Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, de Boelelaan 1081 1081 HV Amsterdam, The Netherlands room: T.1.06 tel: +31 205987870 fax: +31 205987992 e-mail: [EMAIL PROTECTED] homepage: http://www.nat.vu.nl/~kate/ On Wed, 19 Sep 2007, Nestor Fernandez wrote: > Hi, > > I’m trying to get smooth curves connecting points in a plot using > "spline" but I don’t get what I whant. > > Eg.: > x<-1:5 > y <- c(0.31, 0.45, 0.84, 0.43, 0.25) > plot(x,y) > lines(spline(x,y)) > > Creates a valley between the first and second points, then peaks at 3rd, > and another valley between 4th and 5th. I’m trying to get a consistently > growing curve up to the 3rth point and then a decrease like with > SigmaPlot spline curves or with Excel. > > I tried with different spline arguments and also lowess and loess, with > no success. Any ideas? > > Thanks. > > ______________________________________________ > 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. > ______________________________________________ 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.
