Hi everyone. I have these data: probClass<-seq(0,0.9,0.1) prob1<-c(0.0070,0.0911,0.1973,0.2949,0.3936,0.5030,0.5985,0.6869,0.7820,0.8822) prob2<-c(0.0066,0.0791,0.2358,0.3478,0.3714,0.3860,0.6667,0.6400,0.7000,1.0000)
# which I'm plotting as follows: plot(probClass,prob1,xlim=c(0,1),ylim=c(0,1),xaxs='i',yaxs='i',type="n") lines(probClass,prob1) lines(probClass,prob2) polygon(c(probClass,rev(probClass)),c(prob2,rev(prob1)),col="red",border=NA) Given that the total area of the plot is 1, how can I calculate the area between the plotted lines (red polygon)? I have only found the areapl function in the splancs package, but it doesn't work for self-intersecting polygons.. Any help will be gratefully received. Cheers, Márcia ______________________________________________ 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.
