There is an integrate.xy in sfsmic. Limitations discussed there. On Tue, Jul 1, 2008 at 6:27 PM, stephen sefick <[EMAIL PROTECTED]> wrote: > I would like to know the answer to this question now that I know what we are > getting at. integrate() looks like it is the right thing, but it has to use > a function- I would like to know how to just integrate the area under a > curve with just an input of x and y coordinates. > > Stephen > > On Tue, Jul 1, 2008 at 5:22 PM, Carl Witthoft <[EMAIL PROTECTED]> wrote: > >> I think the previous answer (to use lm() ) is not necessarily the best >> option. >> >> Since what you want is the definite integral (area under the curve), you >> can just use one of the existing definite integration tools (sorry, I don't >> recall the names because I don't use them). >> >> If you want to get a "smoothed" curve to remove errors in your data points, >> I'd recommend fitting a spline and integrating under that. >> >> >> ______________________________________________ >> 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. >> > > > > -- > Let's not spend our time and resources thinking about things that are so > little or so large that all they really do for us is puff us up and make us > feel like gods. We are mammals, and have not exhausted the annoying little > problems of being mammals. > > -K. Mullis > > [[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. >
______________________________________________ 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.
