When I reread it, I think you are right. I read split the data plot and assumed a backround rather than just the points . --- Petr Klasterecky <[EMAIL PROTECTED]> wrote:
> If I understand correctly what A. Ezhil asked for, > polygons won't help > here. For coloring the individual points check > ?points and use subsets, e.g. > > plot(x,y) > points(x[x>y-1],y[x>y-1], col="red") > > or something similar. > Petr > > John Kane napsal(a): > > Here is a recent posting by Petr Klasterecky that > > does not seem to be on the archive yet that may > help. > > ---------------------------------------------- > > > > What do you mean by background? Maybe this is > enough: > > > > plot(seq(-3,3,.01), dnorm(seq(-3,3,.01)), > type="n", > > xlab="x", > > ylab="f(x)", main="Normal density") > > polygon(x=c(-4,0,0,-4), y=c(-1,-1,.5,.5), > col="red") > > polygon(x=c(4,0,0,4), y=c(-1,-1,.5,.5), > col="blue") > > lines(seq(-3,3,.01), dnorm(seq(-3,3,.01)), > type="l", > > lwd=2) > > > > Play a little bit with the polygon margins to get > what > > you need. You > > can > > even generate them automatically based on your > data. > > > > Petr > > ----------------------------------------------- > > --- A Ezhil <[EMAIL PROTECTED]> wrote: > > > >> Dear All, > >> > >> I am using the following commands to do the > scatter > >> plot of two vectors, say X and Y. > >> > >> plot(X,Y, col="blue") > >> abline(a=1,b=1, col="red") > >> abline(a=-1,b=1, col="green") > >> > >> I would like to split the scatter plot into 3 > part > >> with 3 different colors: (i) points lies between > 2 > >> lines, (ii) points above line 1, and (iii) points > >> below line 2. I am struggling to do this. I would > >> greatly appreciate any help in doing this. > >> > >> Thanks in advance. > >> > >> Kind regards, > >> Ezhil > >> > >> ______________________________________________ > >> R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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. > > > > -- > Petr Klasterecky > Dept. of Probability and Statistics > Charles University in Prague > Czech Republic > ______________________________________________ R-help@stat.math.ethz.ch 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.