You can't just decide a command exists and try to use it by your arbitrarily chosen name .... did you look at the function integrate() which does exist? It uses a smarter algorithm than Simpson's rule.
Alternatively, Simpson's rule is very easy to code with vectorization -- you should be able to implement it yourself in just a few lines after reading "An Introduction to R". Michael On Mon, Apr 30, 2012 at 6:17 AM, sappy <robert.wittk...@gmx.de> wrote: > Hello, > > i have a question calculating the shaped area between the two curves (see > image). > > http://r.789695.n4.nabble.com/file/n4597813/test.png > > I try to use a Simpson-Integral but it doesn't work. "R" doesn't know the > command! > It is possible, that i need a library? > > Curve 1: y > Curve 2: z > > q<-abs(y-z); est<-sintegral(x,z) > > Greetings > > -- > View this message in context: > http://r.789695.n4.nabble.com/Area-between-2-curves-tp4597813.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. ______________________________________________ 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.
