?cumsum On Tue, May 3, 2011 at 11:32 AM, Alaios <ala...@yahoo.com> wrote: > Dear all, > I would like to know what is the most time efficient way to calculate the > following in a huge vector. > > Let's say that I have the vector > > 1,2,3,4,5,6 > and I want to return a vector of the same length which every cell containing > the sum of the previous cells like this > > 1, 1+2, 1+2+3, 1+2+3+4, 1+2+3+4+5, 1+2+3+4+5+6 > > What do you think is the most effective way to do that (not having to do the > previous sum). > Of course I can do this with a for loop but I believe that might be a more > efficient way in R. > > I would like to thank you in advance for your help > > Best Regards > Alex > > ______________________________________________ > 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. >
-- =============================================== Jon Daily Technician =============================================== #!/usr/bin/env outside # It's great, trust me. ______________________________________________ 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.
