I use this function (a lot): ablinepiece <- function(a=NULL,b=NULL,reg=NULL,from,to,...){
# Borrowed from abline if (!is.null(reg)) a <- reg if (!is.null(a) && is.list(a)) { temp <- as.vector(coefficients(a)) if (length(temp) == 1) { a <- 0 b <- temp } else { a <- temp[1] b <- temp[2] } } segments(x0=from,x1=to, y0=a+from*b,y1=a+to*b,...) } ------------------------------------------------- Remko Duursma Post-Doctoral Fellow Centre for Plant and Food Science University of Western Sydney Hawkesbury Campus Richmond NSW 2753 Dept of Biological Science Macquarie University North Ryde NSW 2109 Australia Mobile: +61 (0)422 096908 On Thu, Jan 22, 2009 at 11:01 AM, Jörg Groß <jo...@licht-malerei.de> wrote: > Hi, > > is there a way to define, that a line drawn via abline() should only go from > for example -2 to 1 on the x-axis (with something working similiar to > xlim()) ? > > thanks for any help! > > ______________________________________________ > 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.