Hi, You could use ?rect
x = 1:5 y=1:5 plot(x,y,t="n",xaxs="i") abline(h=y) xlims = range(x) y.rect = matrix(rep(y,each=2)[-c(1, 2*length(y))], ncol=2, byrow=T) x.rect = matrix(rep(xlims), ncol=2,nrow=nrow(y.rect), byrow=T) cols = 1:4 rect(x.rect[,1], y.rect[,1], x.rect[,2], y.rect[,2],col=cols) and more generally ?polygon HTH, baptiste 2009/7/4 Hannu Kahra <hka...@gmail.com> > Hi, > > I have a graph with seven parallel horizontal lines. Is it possible to > shade the area between two adjacent lines? > > Thank you in advance, > Hannu > > ______________________________________________ > 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. > -- _____________________________ Baptiste Auguié School of Physics University of Exeter Stocker Road, Exeter, Devon, EX4 4QL, UK Phone: +44 1392 264187 http://newton.ex.ac.uk/research/emag ______________________________ [[alternative HTML version deleted]]
______________________________________________ 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.
