Hi, An alternative with ggplot2,
library(ggplot2) ggplot(data=coords) + geom_segment(aes(x=a, xend=b, y=c, yend=c)) HTH, baptiste 2009/11/16 David Winsemius <dwinsem...@comcast.net>: > > On Nov 16, 2009, at 12:40 PM, Tim Smith wrote: > >> Hi, >> I wanted to make a graph with the following table (2 rows, 3 columns): >> a b c >> x 1 3 5 >> y 5 8 6 >> The first column represents the start cordinate, and the second column >> contains the end cordinate for the x-axis. The third column contains the >> y-axis co-ordinate. For example, the first row in the matrix above >> represents the points (1,5),(2,5), (3,5). How would I go about making a >> discontinuous graph ? >> >> thanks! > > coords <- read.table(textConnection("a b c > x 1 3 5 > y 5 8 6"), header=TRUE) > > plot(NULL, NULL, xlim = c(min(coords$a)-.5, max(coords$b)+.5), > ylim=c(min(coords$c)-.5, max(coords$c)+.5) ) > apply(coords, 1, function(x) segments(x0=x[1],y0= x[3], x1= x[2], y1=x[3]) > ) > > -- > > David Winsemius, MD > Heritage Laboratories > West Hartford, CT > > ______________________________________________ > 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.