yep, that did the trick. Thanks, Sachin
On Fri, Mar 8, 2013 at 1:24 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us>wrote: > Something along the lines of > > top100 <- A[match(B,A[,1]),] > > Please provide R code with sample data and desired output. See > http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example > --------------------------------------------------------------------------- > 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. > > Sachinthaka Abeywardana <sachin.abeyward...@gmail.com> wrote: > > >Hi all, > > > >I have two dataframes. The first (A) contains all the stock prices for > >today including today. So the first column is the stock Symbol and the > >second column is the stock price. The second (B) is the symbol list in > >the > >top 100 stocks. > > > >I want to pick out from dataframe A only the rows containing the > >symbols > >from B. i.e. something like: > > > > prices <- A[A[,1]==B,2] > > > >is there any way to do this without using a for loop, I have to do this > >365 > >times (i.e. for one year). > > > >Thanks, > >Sachin > > > > [[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. > > [[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.
