To which I will add: Start up R. At the prompt, type ?Control This will show you the syntax for 'for' loops.
(is this homework?) -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 On 7/26/15, 8:19 AM, "R-help on behalf of Jeff Newmiller" <r-help-boun...@r-project.org on behalf of jdnew...@dcn.davis.ca.us> wrote: >sum(v*w) > >There are no "column vectors" in R... there are vectors (that have no >"direction"), and there are data frames that might only have one column, >and matrices that might have many rows but only one column, and a piece >of matrix or data frame is often converted to a vector when indexing is >used to extract a column or row (e.g. mat[ , 1 ]). > >It may feel too dense to absorb at first, but the Introduction to R >document that comes with R actually explains all this. Try (re)reading >that occasionally until it sinks in. >-------------------------------------------------------------------------- >- >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 26, 2015 1:38:24 AM PDT, admin.dslcompu...@gmail.com wrote: >>Hi Everyone: >> >> >>How do I correctly compute z? >> >> >> >>z = 0; >>for i = 1:7 >> z = z + v(i) * w(i) >>end >> >> >>If there are two column vectors v and w, each with 7 elements (i.e., >>they have dimensions 7x1). >> >> >>Regards, >> >>Hal >> >> >> >> >> >> >>Sent from Surface >> [[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. ______________________________________________ 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.
