Sorry, I answered too quickly. It worked with the "simplified" example I provided but not with non-regular intervals in x:
x<-c(-45,67,131,259,347) y <- c(0.31, 0.45, 0.84, 0.43, 0.25) plot(x,y) lines(spline(x,y, method='n', n=250)) #or: lines(predict(interpSpline(x, y))) Produce the same decrease between first two points and the shape is quite different to that produced by sigmaplot -I need comparable figures. Changing "method" and "n" arguments did not help. Sorry for bothering. Any other suggestion? Greg Snow escribió: > Try: > > >> lines(spline(x,y, method='n', n=250)) >> > > ______________________________________________ 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.
