Dear Jonas, if you can write the difference in y-values between your polygons as a function, you can use integrate() to get the area between the polygons.
It sounds like perhaps your x-values will not match between the polygons because they come from different sources, so you probably have to do some interpolating (with ?approx). hope that helps, Remko -- View this message in context: http://r.789695.n4.nabble.com/calculate-area-between-intersecting-polygons-tp3012980p3013059.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.