"Simply impossible" seems an odd description for a technique described in every elementary calculus text under the heading "integration in cylindrical coordinates". --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity.
yingfu xie <xieyin...@yahoo.com> wrote: >Hello, there! >� >Basically my problem is very clear. I would like to take a >(numerical)�integration of a function f(x,y) which can be quite complex >of x and y, over a disk (x-a)^2+(y-b)^2<= r^2 (with r constant). >However, after some search in R, I just cannot find a function in R >that suits my purpose. Function Integrate applies to one dimensional, >and adaptIntegrate to�rectangle. In my case, it is not easy or >simply�impossible�to transform�the definition area�to a rectangle with >constant�boundaries. ��I must have missed something, but is there any R >function which can solve the integration without going to ex. Monto >Carlo? Many thanks in advance! >� >Best regards, >Yingfu > [[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.