cumsum(1/(1:100)^2)[100]
> On Jul 24, 2015, at 4:37 PM, Janh Anni <annij...@gmail.com> wrote: > > Hello Jeff, > > Thanks a lot. I tried it and see that it prints out the entire 100 partial > sums, so I can take the last value as the partial sum for the first 100 > terms. Would there be any way cumsum can print only the nth partial sum, > i.e. the last value in the array, instead of printing the entire array? > Thanks again. > > Joseph > > On Fri, Jul 24, 2015 at 2:02 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> > wrote: > >> Please reply-all so the mailing list stays in the loop. >> >> cumsum(1/(1:100)^2) >> >> gives you the partial sums up through i=100. >> --------------------------------------------------------------------------- >> 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. >> >> On July 24, 2015 10:30:09 AM PDT, Janh Anni <annij...@gmail.com> wrote: >>> Hello Jeff, >>> >>> Thank you so much for the suggestion, I searched cumsum as suggested >>> but >>> not sure it is what I had in mind. For instance if I had the infinite >>> series: [image: Inline image 1] >>> >>> and want to compute the sum of the, say, first 100 terms, how could I >>> use >>> cusum to do that? >>> >>> Thanks again, >>> >>> Janh >>> >>> >>> On Thu, Jul 23, 2015 at 11:51 PM, Jeff Newmiller >>> <jdnew...@dcn.davis.ca.us> >>> wrote: >>> >>>> ?cumsum >>>> >> >>> --------------------------------------------------------------------------- >>>> 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. >>>> >>>> On July 23, 2015 8:23:39 PM PDT, Janh Anni <annij...@gmail.com> >>> wrote: >>>>> Dear All, >>>>> >>>>> Does anyone know of any R functions that compute partial sums of >>>>> series? >>>>> >>>>> Thanks in advance! >>>>> >>>>> Janh >>>>> >>>>> [[alternative HTML version deleted]] >>>>> >>>>> ______________________________________________ >>>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>>>> 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. >>>> >>>> >> >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
